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Quiz 11
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Q.1
Site for protein/ peptide synthesis is ... ... [ AMU 1998 ]
0%
a) Pyrenoid
0%
b) Chloroplast
0%
c) Ribosome
0%
d) Mitochondrion
Explanation
The ribosome is a complex molecule made of ribosomal RNA molecules and proteins that form a factory for protein synthesis in cells. Answer : (c)
Q.2
Which one is enucleated ... ... [ kerala 2002 ]
0%
a) Squamous epithelial cells
0%
b) Mature leucocyte of man
0%
c) Mature erythrocyte of frog
0%
d) Mature erythrocyte of man
Explanation
Red blood cells are initially produced in the bone marrow with a nucleus. They then undergo a process known as enucleation in which their nucleus is removed. Answer : (d)
Q.3
Which is correct option amongst the following statements? (a) Nuclear membrane, chloroplast, mitochondria, microtubules and pili are absent in prokaryotic cells (b) Nuclear membrane, chloroplast, mitochondria, microtubules and pili are present in eukaryotic cells (c) Ribosomes are 70S in prokaryotic cells and mitochondria. they are 80 S in animal cells
0%
a) a and b are wrong , c is correct
0%
b) b and c are wrong , a is correct
0%
c) b is wrong , a and c are correct
0%
d) a, b and c are wrong.
Explanation
Pili are short, hair-like structures on the cell surface of prokaryotic cells. Statement ‘a’ is not correct. Pilli is not present in eukaryotic cell. Statement ‘b’ is not correct. 80S Ribosomes: They occur only in eukaryotic cells. 70S ribosomes are found both in prokaryotes and eukaryotes. Statement ‘c’ is correct Answer : (a)
Q.4
Middle lamella mainly contain ... ... [ CBSE 2001 ]
0%
a) Ca
0%
b) Mg
0%
c) K
0%
d) Na
Explanation
The middle lamella is made up of calcium and magnesium pectates Answer : (a)
Q.5
Which one does not differ in E.coli and Chlamydomonas ... ... [ CBSE 2012 ]
0%
a) Ribosomes
0%
b) Cell wall
0%
c) Cell membrane
0%
d) Chromosomal organisation
Explanation
Cell membrane of prokaryotes is structurally similar to that of eukaryotes. So, it does not differ in E. coli and Chlamydomonas Answer : (c)
Q.6
ETC is component of ... ... [ HPPMT 1995 ]
0%
a) Golgi apparatus
0%
b) Mitochondria
0%
c) Nucleus
0%
d) Microtubule
Explanation
Electron Transport Chain (ETC) The energy derived from the transfer of electrons through the electron transport chain is used to pump protons across the inner mitochondrial membrane from the matrix to the cytosolic side Answer : (b)
Q.7
Chromatin/ chromosome consists of ... .. [ MPPMT 1999 ]
0%
a) DNA
0%
b) RNA
0%
c) RNA and histones
0%
d) DNA and histones
Explanation
Chromatin is the material that makes up a chromosome that consists of DNA and protein. The major proteins in chromatin are proteins called histones. Answer : (d)
Q.8
Which is not constituent of cell membrane ... .... [ CBSE 2007 ]
0%
a) Glycolipids
0%
b) Phospholipids
0%
c) Cholesterol
0%
d) Proline
Explanation
Proline is a protein found in Collagen, which is the major insoluble fibrous protein in the extracellular matrix Answer : (d)
Q.9
plasmids were discovered by ... ....
0%
a) Hayes and Lederberg
0%
b) Lederberg and Tatum
0%
c) Boliver and Rodriguez
0%
d) Messing and Vieria
Explanation
Plasmids were first discovered by joshua Lederberg and Hayes independently in 1952-53. Joshua described plasmids as extrachromosomal hereditary determinants. Answer : (a)
Q.10
Centriole/ centrosome takes part in .. ... [ JIPMER 1991 ]
0%
a) Nucleolus formation
0%
b) Start of cell division
0%
c) Cell plate formation
0%
d) Spindle formation
Explanation
Centrosomes are associated with the poles of the mitotic spindle, and several cell types require these organelles for spindle formation. Centrioles are involved in the organization of the mitotic spindle and in the completion of cytokinesis Answer : (d)
Q.11
What is not true of sphaerosomes ... ... [ Odisha 2004 ]
0%
a) Single membrane covering
0%
b) Connected with fats
0%
c) Arise from endoplasmic reticulum
0%
d) Involved in photorespiration
Explanation
Sphaerosomes(=spherosomes) or Oleosomes are small cell organelles bounded by single membrane which take part in storage fat, and synthesis of lipid. sphaerosomes arise from endoplasmic reticulum and are surrounded by a single. Chloroplast, peroxisome and mitochondria are three cellular organelles involved in photorespiration Answer : (d)
Q.12
Read the two statements, a and b Statement a : the number of mitochondria in a cell do not correspond to the function of the cell Statement b : Mitochondria are common to both plant and animal cells Choose the correct option from those given ... .... [ KCET 2006 ]
0%
a) Both the statement a and b are correct
0%
b) Both the statement a and b are wrong
0%
c) Statement a is correct, b is wrong
0%
d) Statement b is correct, a is wrong
Explanation
Statement a is not correct as Several work of cell carried out by mitochondria i.e., ATP synthesis, aerobic respiration, maternal inheritance etc. Statement b is correct as Plant and animal cells both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements. Answer : (d)
Q.13
ne of the following is anucleate ... ... [ RPMT 2002 ]
0%
a) Sieve tube
0%
b) Companion cell
0%
c) Medullary ray
0%
d) All the above
Explanation
Sieve tubes members do not have ribosomes or a nucleus and thus need companion cells to help them function as transport molecules. Answer : (a)
Q.14
Hydrolytic enzymes of lysosome function at ... ... [ Odisha 2012 ]
0%
a) Acidic pH
0%
b) Alkaline pH
0%
c) Neutral pH
0%
d) Both B and C
Explanation
Answer : (a)
Q.15
L-shaped chromosomes are ... ... [ BHU 2008 ]
0%
a) Sex chromosomes
0%
b) Acrocentric
0%
c) Telocentric
0%
d) Submetacentric
Explanation
L - shaped or J - shaped chromosomes are called as sub-metacentric chromosomes. Answer : (d)
Q.16
Plant cells store fat in ... ... [ kerala 2005 ]
0%
a) Peroxisome
0%
b) Lysosome
0%
c) Spherosome
0%
d) Microsome
Explanation
Plant cells store fat in Spherosome The membrane of oil droplets in plant cells is inherited through the spherosomes from the endoplasmatic reticulum. So the fat bodies actually are oil vacuoles. Answer : (c)
Q.17
Cell organelle connected with intracellular digestion of macromolecules is ... ... [ kerala 2009 ]
0%
a) Lysosome
0%
b) Peroxisome
0%
c) Polysome
0%
d) Glyoxysome
Explanation
The primary sites of intracellular digestion are organelles known as the lysosomes, which are membrane-bounded compartments containing a variety of hydrolytic enzymes. Answer : (a)
Q.18
Function of the cell us controlled by ... ... [ AFMC 1996 ]
0%
a) Protoplasm
0%
b) Cytoplasm
0%
c) Nucleolus
0%
d) Nucleus
Explanation
The nucleus controls all of the cell's activities, such as growth and metabolism, using the DNA's genetic information. Within the nucleus is a smaller structure called the nucleolus, which houses the RNA (ribonucleic acid). Answer : (d)
Q.19
The organelle present in germinating seeds and connected with β-oxidation or fat digestion is ... .... [ AIIMS 2002 ]
0%
a) Glyoxysome
0%
b) Sphaerosomes
0%
c) Peroxisome
0%
d) Mitochondrion
Explanation
Glyoxysomes are specialized peroxisomes found in plants (particularly in the fat storage tissues of germinating seeds) and also in filamentous fungi. Seeds that contain fats and oils include corn, soybean, sunflower, peanut and pumpkin Answer : (a)
Q.20
A unit membrane is absent over ... ... [ MPPMT 1995 ]
0%
a) Lysosome
0%
b) Microbody
0%
c) Golgi Apparatus
0%
d) Ribosome
Explanation
Unit membrane refers a lipoprotein membrane which encloses many cells and cell organelles and is composed of two electron-dense layers enclosing a less dense layer. Ribosomes are non-membranous cellular organelle thus, it lacks a unit membrane, So, the correct answer is 'Ribosome'. Answer : (d)
Q.21
Cell organelle having flattened sac-like stacked cisternae part in packing and secretion is ... ... [ HPPMT 2007 ]
0%
a) Lysosome
0%
b) Golgi apparatus
0%
c) Ribosome
0%
d) Mitochondrion
Explanation
The Golgi apparatus, also called Golgi complex or Golgi body, is a membrane-bound organelle found in eukaryotic cells (cells with clearly defined nuclei) that is made up of a series of flattened stacked pouches called cisternae. It is located in the cytoplasm next to the endoplasmic reticulum and near the cell nucleus. Answer : (b)
Q.22
Mineral associated with cytochrome is ... ... [ CBSE 1991 ]
0%
a) Cu
0%
b) Mg
0%
c) Fe and Mg
0%
d) Fe and Cu
Explanation
Cytochromes are iron-porphyrin (haem) proteins discovered by Mac Cunn. Cytochromes are infact, the conjugated proteins, composed of a protein molecule and a non-protein group, i.e. inorganic factor iron. It is to be noted, that cell cytochromes have iron on]y, though cyt-a3 possesses both Fe and Cu. Fe has a role in picking up of electrons and Cu hands over the electrons to oxygen. Answer : (d)
Q.23
A cell can form many phenotypes. the property is called ... ... [ AMU 2002 ]
0%
a) Pluripotency
0%
b) Totipotency
0%
c) Parasexuality
0%
d) Parthenogenesis
Explanation
Totipotency is the ability of a cell to develop into complete individual whereas parthenogenesis is a type of sexual reproduction where zygote is formed without the opposite sex. Parasexuality is the transfer of genetic material without undergoing meiosis. Cell, when can be able to form any type of cell of the body (but not complete individual), is called the pluripotent cell. Parthenogenesis is the development of an individual from the single parent without fertilization. Hence answer A is correct. Answer : (a)
Q.24
What is true of ribosomes ... ... [ CBSE 2012 ]
0%
a) Prokaryotic ribosomes are 80 S
0%
b) Composed of RNA and proteins
0%
c) Found only in eukaryotic cells
0%
d) They are not self splicing introns of RNAs
Explanation
Ribosomes are made up of ribosomal proteins and ribosomal RNA (rRNA). In prokaryotes, ribosomes are roughly 40 percent protein and 60 percent rRNA. Option b is correct statement All prokaryotes have 70S (where S=Svedberg units) ribosomes while eukaryotes contain larger 80S ribosomes in their cytosol. The 70S ribosome is made up of a 50S and 30S subunits. Option a is not correct statement Ribosomes are special because they are found in both prokaryotes and eukaryotes. Option c is not correct statement. Self-splicing introns, or ribozymes capable of catalyzing their own excision from their parent RNA molecule, Some RNA molecules have the capacity to splice themselves. Option d is not correct statement Answer : (b)
Q.25
Agranal chloroplasts are found in some ... ... [ MPPMT 1995 ]
0%
a) Succulents
0%
b) Hydrophytes
0%
c) C4 plants
0%
d) C3 plants
Explanation
ln C4 plants, agranal chloroplasts are found in bundle sheath cells Answer : (c)
Q.26
Which organelle is absent in animal cell? ... ... [ RPMT 2006 ]
0%
a) Chloroplasts
0%
b) Golgi apparatus
0%
c) E.R.
0%
d) Lysosomes
Explanation
Both animal and plant cells have mitochondria, but only plant cells have chloroplasts. Plants don't get their sugar from eating food, so they need to make sugar from sunlight. Because animals get sugar from the food they eat, they do not need chloroplasts: just mitochondria Answer : (a)
Q.27
Enzymes associated with converting fats to carbohydrates are located in ... ... [ CBSE 1999 ]
0%
a) Liposomes
0%
b) Golgi bodies
0%
c) Glyoxysomes
0%
d) Microsomes
Explanation
Glyoxysomes (as all peroxisomes) contain enzymes that initiate the breakdown of fatty acids and additionally possess the enzymes to produce intermediate products for the synthesis of sugars by gluconeogenesis. Peroxisomes or glyoxysomes are found in all major groups of eukaryotic organisms including yeasts, fungi, protozoa, plants and animals Answer : (c)
Q.28
Plant cells store fat in .... ... [ Kerala 2005 ]
0%
a) Peroxisome
0%
b) Lysosome
0%
c) Spherosome
0%
d) Microsome
Explanation
Plant cells store fat in Spherosome Answer : (c)
Q.29
Assertion : Specialization of cells is advantageous to organisms. Reason: It increases operational efficiency. ... .... [ AIIMS 2002 ]
0%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
0%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
0%
c) Assertion is true but, Reason is false
0%
d) Assertion is false but, Reason is true
Explanation
Cells make up organs and organs make up systems and systems make up organisms. Each cell must be able to perform as a part of a living organism. Cell specialization is required for cells to perform as a part of a whole living thing. Answer : (a)
Q.30
Cells obtained from an organism were homogenized and centrifuged. A test indicated that the cells contained glycogen. if you are asked to find out as quickly as possible whether the cells are from plant or an animal you would .... .... [ KCET 2008 ]
0%
a) Examine the centrifuge for presence of extracts of centrioles
0%
b) Answer immediately that the cells were from an animal source
0%
c) Examine the centrifuge for the presence of extracts of chloroplasts
0%
d) Answer immediately that the cells were from a plant source
Explanation
Glycogen is a polysaccharide that is the principal storage form of glucose (Glc) in animal and human cells. Answer : (b)
Q.31
A single unit membrane surrounds the organelle ... ... [ MPPMT 1995 ]
0%
a) Nucleus
0%
b) Mitochondrion
0%
c) Lysosome
0%
d) Chloroplast
Explanation
Lysosome is single membrane organelle Answer : (c)
Q.32
DNA of chloroplast differs from nuclear DNA in ... ... [ Wardha 2002 ]
0%
a) Absence of histone protein
0%
b) Fewer bases
0%
c) Single
0%
d) All the above
Explanation
Answer : (d)
Q.33
Which one possesses giant chromosomes ... ... [ WB 2012 ]
0%
a) Drosophila
0%
b) Xenopsylla
0%
c) Branchiomyces
0%
d) Mouse
Explanation
Polytene chromosomes are found in dipteran flies: the best understood are those of Drosophila, Chironomus and Rhynchosciara. Polytene chromosomes are produced when repeated rounds of DNA replication without cell division forms a giant chromosome. Answer : (a)
Q.34
Which of the following statement are false? ... ... [ kerala 2006 ] (a) Most cells are tiny with volume range of 1-100 nm3 (b) Some cells have microvilli to increase the absorptive surface area (c) All cells arise from pre-existing cells (d) In plants, translocation of solutes in performed by xylem vessels and tracheids (e) According to cell theory, all cells arise from abiotic material
0%
a) a, c and e are false
0%
b) a, d and e are false
0%
c) b, c and d are false
0%
d) c, d and e are false
Explanation
The volume of cells given is wrong Most cells are tiny with a volume range of 1-100 cubic micrometers. The statement ’a’ is false. Translocation is the movement of materials from leaves to other tissues throughout the plant. Nutrients, mainly sugars, are created in the leaves during photosynthesis. These are then transported throughout the plant through phloem, The statement ’d’ is false. According to cell theory new cells arise from existing cells. The statement ’e’ is false. Answer : (b)
Q.35
Cork cells have a deposition of ... ... [ MPPMT 2000 ]
0%
a) Pectin
0%
b) Cutin
0%
c) Suberin
0%
d) Lignin
Explanation
Cork cells are made impervious by the deposition of suberin onto cell walls Answer : (c)
Q.36
Amyloplasts store ... ... [ CPMT 2000 ]
0%
a) Glycogen
0%
b)Starch
0%
c) Fat
0%
d) Protein
Explanation
Amyloplasts is a specialized leucoplast which stores starch and also helps in detecting gravity (geotropism) Answer : (b)
Q.37
organelle connected with Glycosylation of proteins is ... ... [ AIIMS 2002 ]
0%
a) Ribosome
0%
b) E.R.
0%
c) Mitochondrion
0%
d) Chloroplast
Explanation
Protein glycosylation is an enzyme-directed chemical reaction that takes place in the ER(Endoplasmic Reticulum) and in the Golgi Apparatus body of the cell. Glycosylation is the reaction in which a carbohydrate, i.e. a glycosyl donor, is attached to a hydroxyl or other functional group of another molecule (a glycosyl acceptor) Answer : (b)
Q.38
Cell wall shows ... ... [ AIIMS 1992 ]
0%
a) Complete permeability
0%
b) Semipermeability
0%
c) Differential permeability
0%
d) Impermeability
Explanation
Cell wall are fully permeable to water, molecules, and proteins. This allows water and nutrients to be freely exchanged between the plant cells. Answer : (a)
Q.39
Which structures perform the function of mitochondria in bacteria?.... [AIPMT 2014]
0%
a) Cell wall
0%
b) Mesosomes
0%
c) Nucleoid
0%
d) Ribosomes
Explanation
Mesosomes are areas in the cell membrane of prokaryotic (bacterial) cells that fold inward. They play a role in cellular respiration Answer:(b)
Q.40
The osmotic expansion of a cell kept in water is chiefly regulated by: …[AIPMT 2014]
0%
a) Plastids
0%
b) Ribosomes
0%
c) Mitochondria
0%
d) Vacuoles
Explanation
The osmotic expansirn of a cell kept in weter is chiefly regulated by vacuole. vacuole store water and macromolecules including ions, sugar, amino and, protein and carbohydrates. The membrane that surrounds the vacuole is called tonoplast The vacuole contains cell sap in it. Answer:(d)
Q.41
Match the following and select the correct answer : …[AIPMT 2014]
(a) centriole
(i) Infoldings in mitochondria
(b)Chlorophyll
(ii)Thylakoids
(c)Cristae
(iii)Nucleic acids
(d)Ribozymes
(iv)Basal body cilia or flagella
0%
a) (a) → (i) ; (b)→ (iii) ; (c)→ (ii); (d)→ (iv)
0%
b) (a) →(iv); (b)→ (iii) ; (c)→ (i) ; (d)→ (ii)
0%
c) (a) →(iv); (b)→ (ii); (c)→ (i) ; (d)→ (iii)
0%
d) (a) →(i); (b)→ (ii) ; (c)→ (iv) ; (d)→ (iii)
Explanation
Centrioles/basal bodies (CBBs) are microtubule-based cylindrical organelles that nucleate the formation of centrosomes, cilia, and flagella. CBBs, cilia, and flagella are ancestral structures; they are present in all major eukaryotic groups. a = iv The chloroplast contains chlorophyll within its thylakoids, b = ii The inner membrane forms a number of infoldings in mitochondria. These infoldings are known as cristae, c = i A ribozyme is a ribonucleic acid (RNA) enzyme that catalyzes a chemical reaction, d - iii Answer:(c)
Q.42
Nuclear envelope is a derivative of : …[AIPMT 2015] Explanation is provided, please click on
0%
a) Rough endoplasmic reticulum
0%
b) Smooth endoplasmic reticulum
0%
c) Membrane of Golgi complex
0%
d) Microtubules
Explanation
Nuclear envelope is a derivative of rough endoplasmic reticulum. It is formed during telophase by fusion of vesicles into which the nuclear envelope develops, during prophase. The perinuclear space present between two membranes of nuclear envelope runs continuous with channels of the ER aiding in shrinkage or expansion of envelope. Answer:(a)
Q.43
The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are: …[AIPMT 2015]
0%
a) Stroma
0%
b) Cristae
0%
c) Grana
0%
d) Stroma lamellae
Explanation
Grana (plural of 'granum') are stacks of structures called thylakoids, which are little disks of membrane on which the light-dependent reactions of photosynthesis take place. Chloroplasts can have from 10 to 100 grana Answer:(c)
Q.44
DNA is not present in: …[AIPMT 2015]
0%
a) Mitochondria
0%
b) Chloroplast
0%
c) Ribosomes
0%
d) Nucleus
Explanation
Ribosomes do not contain DNA. Ribosomes contain RNA and proteins Answer:(c)
Q.45
Select the correct matching in the following pairs: …[AIPMT 2015]
0%
a) Rough ER — Oxidation of fatty acids
0%
b) Smooth ER — Oxidation of phospholipids
0%
c) Smooth ER — Synthesis of lipids
0%
d) Rough ER — Synthesis of glycogen
Explanation
Rough endoplasmic reticulum is an organelle found in eukaryotic cells. Its main function is to produce proteins. Option ‘a’ and ‘d’ are not correct The smooth endoplasmic reticulum functions in many metabolic processes. It synthesizes lipids, phospholipids as in plasma membranes, and steroids. Option ‘b’ is not correct and Option ‘c’ is correct Answer:(c)
Q.46
Cytochromes are found in: …[AIPMT 2015]
0%
a) Lysosomes
0%
b) Matrix of mitochondria
0%
c) Outer wall of mitochondria
0%
d) Cristae of mitochondria
Explanation
Cytochromes are present on the cristate, i.e. inner foldings of mitochondria. Answer:(d)
Q.47
Mitochondria and chloroplast are :- …[AIPMT-2016] (a) semi-autonomous organelles (b) formed by division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery Which one of the following options is correct ?
0%
a) Both (a) and (b) are correct
0%
b) (b) is true but (a) is false
0%
c) (a) is true but (b) is false
0%
d) Both (a) and (b) are false
Explanation
Mitochondrion and chloroplast are semi autonomous organelles as it posses its own DNA. Statement a is correct Mitochondrion and chloroplast Formed by division of pre-existing organelles and they contain DNA and protein synthesizing machinery. Statement ‘b’ is not correct Answer:(c)
Q.48
Microtubules are the constituents of :- …[AIPMT-2016]
0%
a) Cilia, Flagella and Peroxisomes
0%
b) Spindle fibres, Centrioles and Cilia
0%
c) Centrioles, Spindle fibres and Chromatin
0%
d) Centrosome, Nucleosome and Centrioles
Explanation
Microtubules are structures present in cilia, flagella, centrioles and spindle fibres. They are also the part of fibres found in cytoskeleton. Answer:(b)
Q.49
Which one of the following cell organelles is enclosed by a single membrane ? …[AIPMT-2016]
0%
a) Mitochondria
0%
b) Chloroplasts
0%
c) Lysosomes
0%
d) Nuclei
Explanation
Lysosomes is enclosed by a single membrane Answer:(c)
Q.50
A major site for synthesis of lipids is …[NEET 2013]
0%
a) RER
0%
b) SER
0%
c) Symplast
0%
d) Nucleoplasm
Explanation
SER is the site for synthesis of lipids. Answer:(b)
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