Q.1
Which one of the following statement about amino acid is incorrect?
  • a) They are classified on the basis of the 'R' group
  • b) The structure of almost all amino acids are similar except their 'R' group
  • c) All protein molecules are a heteropolymer of amino acid
  • d) They are very important compounds of cytoplasm
Q.2
Co-enzyme means .... ... [B.H.U. 1997]
  • a) Metal
  • b) Vitamin
  • c) Inorganic compound
  • d) a & c both
Q.3
Which one of the following is the major component of chromosome?
  • a) Nucleic acid
  • b) Protein
  • c) Nitrogen base
  • d) Lipid
Q.4
The illustration given below is which nitrogen base:
unit-3_ch-5_que_no-275_img_no1.png
  • a) Guanine
  • b) Cytosine
  • c) Uracil
  • d) Adenine
Q.5
The rate of most of enzyme catalyzed reaction changes with pH as the pH Increases this rate?
  • a) Reaches a maximum
  • b) Reaches a minimum
  • c) Decreases
  • d) Increases
Q.6
which enzyme would change glucose – 6 phosphate to fructose – 6 phosphate?
  • a) Transferase
  • b) Isomerase
  • c) Lyases
  • d) glucose phosphatase
Q.7
A non-protein component of enzyme is called?
  • a) Co-factor
  • b) Activator
  • c) Co-enzyme
  • d) Inhibitor
Q.8
A: Conjugated protein are responsible for movements R: Protein become associated with other than amino acids are known as Conjugated protein
  • a) Both A and R are true and R is the correct explanation of A
  • b) Both A and R are true but R is not the correct explanation of A
  • c) A true R false
  • d) both A and R are false
Q.9
Enzymes are formed by conjunction of which molecule? [AFMC 1994]
  • a) Fatty acid
  • b) glucose
  • c) amino acid
  • d) carbon
Q.10
Generally protein and carbohydrate components are found in cow milk… [KCET 2005]
  • a) Albumin, Lactose
  • b) Globulin, Casin
  • c) Casin, Lactose
  • d) Casin, Fructose
Q.11
Maltose are insoluble in... .. [PMT 2000]
  • a) Water
  • b) Alcohol
  • c) Acid
  • d) Basic
Q.12
Which is an organic component found in most cells? [DPMT 2009]
  • a) Glucose
  • b) Lignin
  • c) Sodium chloride
  • d) Oxygen
Q.13
Given below chemical formula is.... [H PMT 2002] CH3(CH22)7COOH
  • a) α - ketoglutarate
  • b) Oxalosuccinet
  • c) Oleic acid
  • d) Linolic acid.
Q.14
Chitin is a ... .. [WB JEE 2010]
  • a) Polysaccharide
  • b) Nitrogenous polysaccharide
  • c) Lipoprotein
  • d) Protein
Q.15
The middle Lamella is made up of... .. [CBSE AIPMT 2009]
  • a) Muramic acid
  • b) Calcium pectate
  • c) Phosphoglycerol
  • d) Hemicellulose.
Q.16
In a polysaccharide, the individual monosaccharides are linked by a......
  • a) Glycosidic bond
  • b) Peptide bond
  • c) Ester bond
  • d) Phosphodiester bond
Q.17
Starch and Cellulose are the compounds made up to many units of ... ..
  • a) Simple sugar
  • b) Fatty acid
  • c) Glycerol
  • d) Amino acid
Q.18
Lipids are insoluble in water because lipid molecules are... .. [CBSE PMT 2002]
  • a) Neutral
  • b) Zwitter ions
  • c) Hydrophobic
  • d) Hydrophillic
Q.19
Find out the Miss matched pairs:
  • a) Protein - important compounds of nucleus
  • b) Nucleic acid - major components of chromosomes
  • c) Amino acid - an amphoteric compound
  • d) Enzymes - Colloidal catalysts
Q.20
The illustration given below is which nitrogen base:
unit-3_ch-5_que_no-296_img_no1.png
  • a) Uracil
  • b) Cytosine
  • c) Thymine
  • d) Ribose
Q.21
Ribonucleoside formed from ribonucleotide while:
  • a) It made from sugar
  • b) It made from nitrogen base
  • c) It made from phosphate
  • d) a, b, c all above
Q.22
Nucleic acids were discovered by whom?
  • a) Crick
  • b) Wilkinson
  • c) Meischer
  • d) Watson
Q.23
The DNA stands are antiparallel because of:
  • a) Ester bond
  • b) Phosphodiester bond
  • c) Disulphide bond
  • d) Hydrogen bond
Q.24
The hydrogen bonds between adenine and guanine are
  • a) 2
  • b) 3
  • c) 1
  • d) 0
Q.25
The RNA transporting amino acid to the protein synthesizing site known as
  • a) t-RNA
  • b) r-RNA
  • c) m-RNA
  • d) Any one of a, b, c
Q.26
Which of the following is not true for enzyme
  • a) Water soluble and colloidal in nature
  • b) Lowers the activation energy level
  • c) Used up in the biochemical reaction
  • d) Affected by the change in temperature
Q.27
Which the following pair regarding to biological importance of carbohydrates is not correctly matched?
  • a) Cellulose → Forms the plant cell wall.
  • b) Glycogen → Reserve food in animals.
  • c) Ribose sugar → Structural components of ATP..
  • d) Galactose → The most widely used in respiration.
Q.28
Inorganic catalyst recognized what when it attached an enzyme?
  • a) Activator
  • b) Co- enzyme
  • c) Inhibitor
  • d) Apoenzyme
Q.29
Which one of the following pairs is not correctly matched?
  • a) Triose sugar - DHAP.
  • b) Starch - amylase and amyloprectin.
  • c) Phospholipid - plasma membarane.
  • d) Cortisone - sterols.
Q.30
Which of the following statements are true? P : Those which have molecular weights 596 Dalton are called micromolecules. Q: Those which have molecular weights 1288 Dalton are called macromolecules. R: Lipids have molecular weight more than ten thousand Dalton and above. S: Biomolecules are of three types (i) micromolecules (ii) simply biomolecules and (iii) macromolecules.
  • a) P and Q
  • b) P, Q and R
  • c) R and S
  • d) Q and S.
Q.31
P : The presence of lipid is inevitable for the activity of glucose phosphatase. Q : Copper is co-factor for the activation of enzymes like phosphatase.
  • a) If both 'A' and 'R' true and 'R' is a correct explanation of’ A’
  • b) If both 'A' and 'R' true and 'R' is not a correct explanation of’A’
  • c) If 'A' is true the 'R' is false
  • d) If 'A' is false the 'R' is true
Q.32
Which of the following statement regarding the Fatty acid is not correct?
  • a) Unsaturated fatty acids are two successive carbon atoms at certain places therein are linked by a double bond.
  • b) Saturated fatty acids are capable of accepting hydrogen or halogen atoms.
  • c) Butyric acid and palmitic acids are Saturated fatty acids
  • d) Crotonic acid and oleic acid are Unsaturated fatty acids.
Q.33
A : Palmitic acids are long chain unsaturated fatty acid. R : Two successive carbon atoms at certain places there in are linked by double bond.
  • a) If both the assertion and the reason are true and the reason is a correct explanation ofthe assertion.
  • b) If both the assertion and the reason are true and the reason is not a correct explanation of the assertion.
  • c) Assertion is true but the reason is false.
  • d) Assertion is false but the reason is True
Q.34
A : Hydrolysis of a molecule of sucrose yields glucose + fructose. R : Hydrolysis of disaccharide yields two molecules of monosaccharide.
  • a) If both the assertion and the reason are true and the reason is a correct explanation ofthe assertion.
  • b) If both the assertion and the reason are true and the reason is not a correct explanation of the assertion.
  • c) Assertion is true but the reason is false.
  • d) Assertion is false but the reason is True
Q.35
A : In the structure of wax one molecule of monohydroxy alcohol. R : Lipids such as wax form a protective layer on the outer surface of the aerial plant organs.
  • a) If both the assertion and the reason are true and the reason is a correct explanation ofthe assertion.
  • b) If both the assertion and the reason are true and the reason is not a correct explanation of the assertion.
  • c) Assertion is true but the reason is false.
  • d) Assertion is false but the reason is True
Q.36
Which of the following group is not organic group? [AIPMT 2010]
  • a) Fats, Proteins , Enzymes, Hormones.
  • b) Co-factors, Hormones, Water, Minerals.
  • c) Proteins, Carbohydrates, Nucleic acid, Hormones.
  • d) Proteins, Carbohydrates, Fats, Enzymes.
Q.37
Which one of the following is incorrect for Protein:
  • a) They transport some nutrients across cell membrane
  • b) They are heteropolymer of amino acids
  • c) They possess C, H, O, N and P in their constitution
  • d) They are very important compounds of cytoplasm
Q.38
Find out the one group of amino acids which are related with each other:
  • a) Valine, Histidine
  • b) Serine, Tyrosine
  • c) Glutamate, Proline
  • d) Lysine, Laucine
Q.39
Dipeptide means:
  • a) Two similar amino acids attached by peptide bond
  • b) Two dissimilar amino acids attached by peptide bond
  • c) Two similar or dissimilar amino acids attached by peptide bond
  • d) Two similar or dissimilar proteins attached by peptide bond
Q.40
Polypeptide means:
  • a) A polypeptide chain is formed by more than two nucleotides
  • b) A polypeptide chains is formed by more than two amino acids
  • c) A polypeptide chains is formed by many similar amino acids
  • d) A polypeptide chain is formed by many similar nucleotides
Q.41
Which of the following is correct for the quaternary structure of protein?
  • a) It represents a three dimensional form of whole protein
  • b) It forms with interaction between different polypeptide Chain.
  • c) a and b both
  • d) It forms the three dimensional arrangement of the atoms within a single polypeptide chain
Q.42
Which of the following statement is incorrect about immunoglobulin?
  • a) It has the property of immunity
  • b) It consist of more than one polypeptide chain
  • c) It present in blood cell
  • d) b and c both
Q.43
Which are the structural units of DNA?
  • a) Nitrogen base
  • b) Pentose sugar
  • c) nucleotide
  • d) phosphoric acid
Q.44
What is Ribonucleoside?
  • a) Ribose + Nucleic acid
  • b) Ribose + Nitrogen base
  • c) Ribose + Phosphate
  • d) Ribose + Adenine
Q.45
A DNA stand is directly involved in the synthesis of all the following except –
  • a) Another DNA Stand
  • b) t- RNA
  • c) m-RNA
  • d) Protein
Q.46
Nucleic acids are polymers of which molecules?
  • a) Nucleosides
  • b) Nucleotides
  • c) Polypeptides
  • d) polysomes
Q.47
Which of the following is correct?
  • a) A=T
  • b) C=G
  • c) G=A
  • d) A=C
Q.48
Which of the following ratio is constant in the DNA of all the species?
  • a) A+U / T+C
  • b) A+G/ C+T
  • c) A+C / T+G
  • d) A+T / C+G
Q.49
Which is longest of all RNA?
  • a) m-RNA
  • b) t-RNA
  • c) r-RNA
  • d) None above
Q.50
Which one is known as adapter molecule?
  • a) DNA
  • b) m-RNA
  • c) t-RNA
  • d) r-RNA
0 h : 0 m : 1 s