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Quiz 10
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Q.1
Protoplasm is ... .... [ MPPMT 1999 ]
0%
a) Emulsion
0%
b) Complex colloidal solution
0%
c) Molecular solution
0%
d) Suspension
Explanation
Protoplasm or living matter of cell is a polyphasic crystallo - colloid complex that possesses all the properties of life and is found inside the living cells Answer : (b)
Q.2
Which is not true of active transport ... .... [ Odisha 2012 ]
0%
a) It is chemical process
0%
b) Energy is obtained from ATP
0%
c) Occurs through carrier molecules
0%
d) Not modified by enzymes
Explanation
Active transport uses cellular energy to move them against a gradient, polar repulsion, or other resistance, here there is no chemical change, active transport is not chemical process Answer : (a)
Q.3
Ingestion of solid or liquid substances into cell is referred to as ... ..... [ DPMT 2011 ]
0%
a) Endocytosis
0%
b) Diffusion
0%
c) Osmosis
0%
d) Exocytosis
Explanation
Endocytosis is the process of actively transporting molecules into the cell by engulfing it with its membrane. Endocytosis and exocytosis are used by all cells to transport molecules that cannot pass through the membrane passively. Answer : (a)
Q.4
Fluid mosaic model of cell membrane was put forward by ... .... [ AIIMS 1992 ]
0%
a) Danielli and Davson
0%
b) Singer and Nicolson
0%
c) garner and Allard
0%
d) Watson and Crick
Explanation
Answer : (b)
Q.5
Match the following ... .. [ kerala 2006 ]
(a) bacteria
(1.) Synthesis and storage of lipids
(b) Sphaerosomes
(2.) Idiogram
(c) Chloroplasts
(3.) Glycocalyx
(d) Karyotype
(4.) Thylakoids
0%
a) a - 3, b - 1, c- 4, d - 2
0%
b) a - 3, b - 1, c- 2, d - 4
0%
c) a - 4, b - 3, c- 2, d - 1
0%
d) a - 1, b - 2, c- 3, d - 4
Explanation
The glycocalyx is a carbohydrate-enriched coating that covers the outside of many eukaryotic cells and prokaryotic cells, particularly bacteria. a= 3 Sphaerosomes(=spherosomes) or Oleosomes are small cell organelles bounded by single membrane which take part in storage and synthesis of lipid. b=1 The thylakoid membranes of a chloroplast is an internal system of interconnected membranes, that carry out the light reactions of photosynthesis.c =4 Idiogram is the diagrammatic representation of karyotype. d = 4 Answer : (a)
Q.6
A nucleotide is formed of ... ... [ BHU 2001 ]
0%
a) Purine, pyrimidine and phosphate
0%
b) purine, sugar and phosphate
0%
c) Nitrogen base, sugar and phosphate
0%
d) Pyrimidine, sugar and phosphate
Explanation
The DNA molecule is a polymer of nucleotides. Each nucleotide is composed of a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group. Answer : (c)
Q.7
Flat membranous bag are characteristic of ... .... [ RPMT 1998 ]
0%
a) Peroxisomes
0%
b) Mitochondria
0%
c) Lysosomes
0%
d) Golgi bodies
Explanation
Golgi apparatus is an organelle found in the eukaryotic cells which forms a complex of vesicles and folded membranes within the cytoplasm that is involved in secretion, glycosylation of proteins and lipids and helps in intracellular transport. The Golgi apparatus semicircular membrane-bound sacs or folds (5-8 in number) called cisternae (with ribosome molecule) which are called the functional units of the organelle Answer : (d)
Q.8
The one located inside a vacuole is ... ... [ Manipal 2005 ]
0%
a) Tonoplast
0%
b) Matrix
0%
c) Ergastic substances
0%
d) Cell sap
Explanation
Cell sap, the watery fluid within the central vacuole of a plant cell. Answer : (d)
Q.9
The term sarcode was used for living substance of cell by ... ... [CPMT 2000 ]
0%
a) Hooke
0%
b) Dujardin
0%
c) Purkinje
0%
d) Brown
Explanation
Dujardin (April 5, 1802 – April 8, 1860) is a French biologist and cytologist who is known for his studies in the classification of protozoans and invertebrates. In the year 1835 Dujardin discovered the protoplasm and named as “sarcode”. Answer : (b)
Q.10
Electron microscope has revealed the presence of ... ... [ AFMC 1996 ]
0%
a) Ribosomes
0%
b) Chromosomes
0%
c) Chloroplast
0%
d) Leucoplast
Explanation
Electron microscope can magnify the objects up to 2,00,000 times (now possible up to 2,50,000 - 4,00,000) and direct of objects is possible on this microscope. Presence of ribosomes (size 23nm in diameter) is revealed with the help of an electron microscope. Answer : (a)
Q.11
Consider the following statements A) In prokaryotic cell, an outgrowth of plasma membrane into cell is called polysome B) SER is major site for glycoprotein synthesis C) RuBisCO is most abundant protein of biosphere D) Mitochondria, chloroplasts and peroxisomes are not part of endomembrane system. Of the above statement ... [ Kerala 2012 ]
0%
a) C and D alone are correct
0%
b) A and B alone are correct
0%
c) B and C alone are correct
0%
d) B and D alone are correct
Explanation
Answer : (a)
Q.12
Which of the following statement regarding mitochondria membrane is not correct? ... ... [ CBSE 2006 ]
0%
a) Outer membrane resembles a sieve
0%
b) Outer membrane is permeable to all kinds of molecules
0%
c) Enzymes of electron transport chain are embedded in outer membrane
0%
d) Inner membrane is highly convoluted forming a series of infoldings.
Explanation
The inner membrane of the mitochondria is the site of the electron transport chain (aerobic respiration). Statement c is not correct Answer : (c)
Q.13
Protoplasm is ... ... [ AMU 2000 ]
0%
a) Nonliving matter
0%
b) Bearer of hereditary characters
0%
c) Living matter without function
0%
d) Physical basis of life
Explanation
Thomas Huxley (1869) referred to Protoplasm as the "physical basis of life" and considered that the property of life resulted from the distribution of molecules within this substance. Answer : (d)
Q.14
Which is wrong ... ... [ CBSE 2007 ]
0%
a) Both chloroplast and mitochondrion have an internal compartment or thylakoid space bounded by thylakoid membrane
0%
b) Both contain DNA
0%
c) Chloroplast is generally larger
0%
d) Both are covered by double membrane
Explanation
Thylakoids are membrane-bound compartments inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis. Mitochondrion don’t have thylakoid membrane: Statement a is not correct Answer : (a)
Q.15
E.R. is more developed in ... .... [ MPPMT 1999 ]
0%
a) Green cells
0%
b) Young cells
0%
c) Mature cells
0%
d) Bacteriophage
Explanation
Answer : (c)
Q.16
DNA is present in both ... .... [ AFMC 2011 ]
0%
a) Centriole and mitochondria
0%
b) Ribosomes and plastids
0%
c) Chloroplasts and mitochondria
0%
d) Chloroplasts and Golgi apparatus
Explanation
All of nucleus, chloroplasts and mitochondria have their own DNA. Answer : (c)
Q.17
Ribosomes are made up of ... ... [ MPPMT 1995 ]
0%
a) DNA and protein
0%
b) DNA alone
0%
c) RNA and proteins
0%
d) DNA and RNA
Explanation
A ribosome is made out of RNA and proteins, and each ribosome consists of two separate RNA-protein complexes, known as the small and large subunits. The large subunit sits on top of the small subunit, with an RNA template sandwiched between the two. Answer : (c)
Q.18
Secretory function of cell is carried out by ... .. [ CPMT 2000 ]
0%
a) Peroxisomes
0%
b) Golgi apparatus
0%
c) Lysosomes
0%
d) Sphaerosomes
Explanation
The golgi apparatus is a membrane bound organelle found in most cells. It is responsible for packaging proteins into vesicles prior to secretion and therefore plays a key role in the secretory pathway. Answer : (b)
Q.19
Peroxisomes occur in ... ... [ Odisha 2005 ]
0%
a) Bundle sheath
0%
b) Vascular bundles
0%
c) Mesophyll cells
0%
d) Endosperm
Explanation
Answer : (c)
Q.20
An oxidative organelle is ... ... [ CET Chd 2011 ]
0%
a) Ribosome
0%
b) Golgi body
0%
c) Peroxisome
0%
d) ER
Explanation
Peroxisomes are oxidative organelles Answer : (c)
Q.21
Schleiden and Schwann proposed cell theory in .. ... [ Har PMT 2002 ]
0%
a) 1836 - 37
0%
b) 1838 - 39
0%
c) 1901 -02
0%
d) 1938 -39
Explanation
Answer : (b)
Q.22
Assembly of 60 S and 40 S subunits of ribosome produces .... ... [ kerala 2003 ]
0%
a) 80 S
0%
b) 70 S
0%
c) 50 S
0%
d) 100 S
Explanation
Eukaryotic ribosomal subunits have sedimentent rates of 60S and 40S because they contain different rRNA molecules and proteins than prokaryotic ribosomal subunits. The two subunits combine during protein synthesis to form a complete 80S ribosome about 25nm in diameter Answer : (a)
Q.23
in chloroplasts the chlorophyll is located in .... ... [ CBSE 2005 ]
0%
a) Stroma
0%
b) Grana
0%
c) Pyrenoid
0%
d) Both A and B
Explanation
The chloroplast contains chlorophyll within its thylakoids, which absorbs light energy and gives chloroplasts its green color. Stacks of thylakoids are known as grana, which exist in the open space of the chloroplast known as the stroma Answer : (b)
Q.24
Which was purines? ... ... [ RPMT 2006 ]
0%
a) Adenine and Guanine
0%
b) Adenine and Thymine
0%
c) Cytosine and Thymine
0%
d) Cytosine and Guanine
Explanation
The two-carbon nitrogen ring bases adenine and guanine are purines, while the one-carbon nitrogen ring bases thymine and cytosine are pyrimidines. Answer : (a)
Q.25
GERL is associated with ... ... [ AIIMS 1997 ]
0%
a) Peroxisomes
0%
b) Golgi body
0%
c) Mitochondrion
0%
d) Lomasome
Explanation
The GERL system is associated with biological processes such as endocytosis and exocytosis. It is comprised of (1) Golgi apparatus, (2) endoplasmic reticulum, and (3) lysosome Answer : (b)
Q.26
ion Q15) Balbiani rings are parts of:
0%
a) Ribosome.
0%
b) Plasma membrane.
0%
c) Giant chromosome.
0%
d) Microtubule.
Explanation
Balbiani rings are sites of particularly active RNA synthesis on the polytene. Polytene chromosomes are large chromosomes which have thousands of DNA strands. Answer:(c)
Q.27
Which is correct .... ... [CPMT 2010 ]
0%
a) Oil storage - Rhodoplast
0%
b) Protein storage - Amyloplast
0%
c) Starch storage - Aleuroplasts
0%
d) Fat storage - Elaioplast
Explanation
An Elaioplast is a leucoplast that is primarily involved in storing fats or lipids inside fat droplets plastoglobuli in plants particularly in monocots and liverworts. (Option d is correct) Rhodoplast definition: a plastid found in red algae, containing red pigment as well as chlorophyll (Option a is not correct) Amyloplasts is a specialized leucoplast which stores starch and also helps in detecting gravity (geotropism). Option b is not correct Aleuroplast A leucoplast type of plastid that is involved in the storage of proteins.( Option c is not correct) Answer : (d)
Q.28
Cell vacuole contains ... ... [ CPMT 1991 ]
0%
a) Water
0%
b) Metabolic gases
0%
c) Water and dissolved substances
0%
d) Cytoplasm
Explanation
Vacuoles are essentially enclosed compartments which are filled with water containing inorganic and organic molecules including enzymes in solution, though in certain cases they may contain solids which have been engulfed Answer : (c)
Q.29
Consider the statements regarding facilitated transport 1) Requires ATP energy 2) Transport saturates 3) Highly selective 4) Requires special membrane properties 5) Uphill transport Of the above statements ... ... [ kerala 2012 ]
0%
a) 1, 2, 3 are relevant, 4 and 5 are irrelevant
0%
b) 2, 3, 5 are relevant, 1 and 4 are irrelevant
0%
c) 2, 3, 4 are relevant, 1 and 5 are irrelevant
0%
d) 3, 4, 5 are relevant, 1 and 2 are irrelevant
Explanation
Facilitated diffusion also known as facilitated transport or passive-mediated transport, is the process of spontaneous passive transport as opposed to active transport of molecules or ions across a biological membrane via specific transmembrane integral protein. Therefore no ATP is consumed Statement 1 is irrelevant In Uphill transport is the transport of substances from their low concentration to their high concentration and liquid flow from higher concentration to lower concentration. But in facilitated transport substance moves from higher concentration to lower concentration. Statement 5 is irrelevant Answer : (c)
Q.30
Cell saps occurs in organelle ... .. [ MPPMT 2002 ]
0%
a) Nucleolus
0%
b) Vacuole
0%
c) Endoplasmic reticulum
0%
d) Golgi bodies
Explanation
Cell sap (fluid inside the vacuole of a plant cell which serves as storage of materials) occurs in the vacuole Answer : (b)
Q.31
Which organelle occurs both in plants and animals ... ... [ Odisha 2007 ]
0%
a) Cell wall
0%
b) Mitochondria
0%
c) Centriole
0%
d) Chloroplast
Explanation
Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes Answer : (b)
Q.32
Mitochondria are related to ... ... [ MPPMT 1999 ]
0%
a) Viruses
0%
b) Plasmids
0%
c) Plastids
0%
d) Procaryotes
Explanation
Both mitochondria and plastids contain DNA that is different from that of the cell nucleus and that they have their own protein biosynthesis machinery Answer : (c)
Q.33
Which of the following show selective permeability? ... ... [ Odisha 2005 ]
0%
a) Cell membrane
0%
b) Cell wall
0%
c) Cytoplasm
0%
d) Protoplasm
Explanation
Selective permeability is a property of cellular membranes that only allows certain molecules to enter or exit the cell Answer : (a)
Q.34
An individual has a number of different types of cells was first stated by ... ... [ Har PMT 2002 ]
0%
a) Dujardin
0%
b) Robert Brown
0%
c) Dutrochet
0%
d) Schleiden and Schwann
Explanation
Answer : (d)
Q.35
Histones are rich in amino acids ... ... [ RPMT 2011 ]
0%
a) Arginine and lysine
0%
b) Lysine and histidine
0%
c) Valine and histidine
0%
d) Arginine and histidine
Explanation
Histone a group of water-soluble proteins found in association with the DNA of plant and animal chromosomes. They contain a large proportion of the basic (positively charged) amino acids lysine, arginine, and histidine Answer : (a)
Q.36
Robert Hook coined the term cell in ... ... [ BHU 2008 ]
0%
a) 1650
0%
b) 1665
0%
c) 1865
0%
d) 1960
Explanation
In 1665 Robert Hooke published what would become his most famous work, Micrographia (”Small Drawings”). In it he included his studies and illustrations of the crystal structure of snowflakes and first used the word cell to name the microscopic honeycomb cavities in cork Answer : (b)
Q.37
Lysosome enzymes are active at pH ... .. [ MPPMT 2002 ]
0%
a) 5
0%
b) 7
0%
c) 8
0%
d) Variable
Explanation
All of the lysosomal enzymes are acid hydrolases, which are active at the acidic pH about 5 that is maintained within lysosomes Answer : (a)
Q.38
Chromosome having terminal centromere capped by telomere is ... ... [ HPPMT 2007 ]
0%
a) Metacentric
0%
b) Submetacentric
0%
c) Acrocentric
0%
d) Telocentric
Explanation
Answer : (c)
Q.39
Stack of lamellae found inside a plastid is ... ... [ Odisha 2004 ]
0%
a) Thylakoid
0%
b) Stroma
0%
c) Granum
0%
d) Oxysome
Explanation
A granum is a coin-shaped stack of thylakoidsor or lamellae, which are the membrane-like structures found inside the chloroplasts of plant cells Answer : (c)
Q.40
Double membrane is absent in ... ... [ CPMT 1995 ]
0%
a) Mitochondria
0%
b) Chloroplast
0%
c) Nucleus
0%
d) Lysosomes
Explanation
Lysosomes are single membrane bound organelles rich in digestive enzymes, help in breakdown of large molecules like proteins, polysaccharides, lipids and nucleic acids Answer : (d)
Q.41
Tonoplast, a differentially permeable membrane surrounds ... ... [ AMU 1991 ]
0%
a) vacuole
0%
b) Nucleus
0%
c) Cytoplasm
0%
d) Lysosome
Explanation
Tonoplast is the membrane that surrounds the central or large vacuole of the plant. The tonoplast must work to keep the vacuole acidic by bringing in protons. This allows the vacuole's enzymes to break down food matter. Answer : (a)
Q.42
Structural element of chromatin is ... ... [ WB 2011 ]
0%
a) Histone
0%
b) Acid protein and DNA
0%
c) Nucleosome
0%
d) Nuclear matrix
Explanation
The DNA double helix in the cell nucleus is packaged by special proteins termed histones. The formed protein/DNA complex is called chromatin. The basic structural unit of chromatin is the nucleosome. Answer : (c)
Q.43
Match the columns: ... ... [ kerala 2005 ]
Column I
Column II
(a) Endoplasmic reticulum
(i) Cellular respiration
(b) Free ribosome
(ii) Osmoregulation and excretion
(c) Mitochondrion
(iii) Synthesis of lipids
(d) Contratile
(iv) Synthesis of non-secretory proteins
0%
a) a - i, b - ii, c - iv, d - iii
0%
b) a - iii, b - iv, c - i, d - ii
0%
c) a - iii, b - iv, c - ii, d - i
0%
d) a - ii, b - i, c - iii, d - iv
Explanation
Ribosomes attached to Endoplasmic reticulum is involved in protein and lipid synthesis. a= iii Free ribosomes synthesize proteins that are released into the cytosol and used within the cell or Synthesis of non-secretory proteins. b= iv Mitochondria have an important role in cellular respiration through the production of ATP, using chemical energy found in glucose and other nutrients. c = i A contractile vacuole (CV) is an organelle, or sub-cellular structure, that is involved in osmoregulation and waste removal. d = i Answer : (b)
Q.44
Callus is ... ... [ JKCMEE 2002 ]
0%
a) Material used in healing in phloem
0%
b) Secondary tissue developed by woody plants
0%
c) An undifferentiated mass of cells
0%
d) All the above
Explanation
Plant callus (plural calluses or calli) is a growing mass of unorganized plant parenchyma cells. In living plants, callus cells are those cells that cover a plant wound. Answer : (c)
Q.45
Nucleus was discovered by ... ... [ AFMC 2003 ]
0%
a) Purkinje
0%
b) Nageli
0%
c) Brown
0%
d) Hofmeister
Explanation
Scottish botanist Robert Brown (1773-1858) was responsible for discovering the nucleus of a cell Answer : (c)
Q.46
In active transport. ATP energy is used by carrier proteins to transport materials ... ... [ AIIMS 2011 ]
0%
a) Against concentration gradient across cell membrane
0%
b) Against concentration gradient across cell wall
0%
c) Along concentration gradient across cell wall
0%
d) Along concentration gradient across cell membrane
Explanation
To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells. Answer : (a)
Q.47
In 1831, Robert Brown discovered ... ... [ Odisha 2007 ]
0%
a) Cell
0%
b) Dictyosome
0%
c) Nucleus
0%
d) Nucleolus
Explanation
Scottish botanist Robert Brown (1773-1858) was responsible for discovering the nucleus of a cell Answer : (c)
Q.48
Nucleosome contains ... ... [ MPPMT 1999 ]
0%
a) Nucleolus
0%
b) Genes
0%
c) Microfilaments
0%
d) Histones
Explanation
The nucleosome core particle consists of approximately 146 base pairs (bp) of DNA wrapped in 1.67 left-handed superhelical turns around a histone octamer, consisting of 2 copies each of the core histones H2A, H2B, H3, and H4. Answer : (d)
Q.49
The discoverer of lysosome is ... ... [ BHU 1991 ]
0%
a) Palade
0%
b) de Duve
0%
c) Porter
0%
d) Golgi
Explanation
Christian de Duve, whose laboratory in Louvain discovered lysosomes in 1955 and defined peroxisomes in 1965 Answer : (b)
Q.50
identify correct option A) Chromoplasts - Contain pigments other than chlorophyll B) Leucoplasts - Devoid of any pigment C) Amyloplasts - Store proteins D) Aleuroplasts - Store oils and fats E) Elaioplasts - Store carbohydrates
0%
a) B and C correct
0%
b) C and D correct
0%
c) D and E correct
0%
d) A and B correct
Explanation
Answer : (d)
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