[MCQ] PROTEINS AND PROTEIN METABOLISM- Part 24

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PROTEINS AND PROTEIN METABOLISM- Part 23

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Congratulations - you have completed PROTEINS AND PROTEIN METABOLISM- Part 23. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%

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Question 1

All the following amino acids are optically active except

A	Tryptophane
B	Phenylalanine
C	Valine
D	Glycine

Question 2

Proteinous substances which catalyze biochemical reactions are known as

A	Activators
B	Catalysts
C	Enzymes
D	Hormones

Question 3

Insulin is a protein which controls

A	Blood clotting
B	Metabolic pathway
C	Digestion
D	Kreb’s cycle

Question 4

Proteins which are responsible for defence mechanism are called

A	Antimetabolites
B	Antibodies
C	Antimycins
D	Apoproteins

Question 5

When the net charge on an amino acid is zero, the pH is maintained as?

A	4.5
B	11.2
C	7.0
D	9.1

Question 6

Isoelectric point of amino acids is used for

A	Crystallisation
B	Precipitation
C	Solubility
D	Reactivity

Question 7

Xanthoproteic test is positive in proteins containing

A	Sulphur amino acids
B	α-Amino acids
C	Aromatic amino acids
D	Aliphatic amino acids

Question 8

All α-amino acids give positive

A	Million’s test
B	Biurete test
C	Xanthproteic test
D	Ninhydrine test

Question 9

N-terminal amino acids of a polypeptide are estimated by

A	Edmann reaction
B	Sanger’s reagent
C	Formaldehyde test
D	Ninhydrine reaction

Question 10

Million’s test is positive for

A	Phenylalanine
B	Glycine
C	Tyrosine
D	Proline

Question 11

Indole group of tryptophan responses positively to

A	Glyoxylic acid
B	Schiff’s reagent
C	Biuret test
D	Resorcinol test

Question 12

Guanidine group of argentine gives positive test with

A	Lead acetate
B	Sakaguchi reagent
C	Tricholoroacetic acid
D	Molisch’s reagent

Question 13

Thiol group of cysteine gives red colour with

A	Sodium acetate
B	Lead acetate
C	Sodium nitroprusside
D	Barfoed’s reagent

Question 14

Protein deficiency disease is known as

A	Cushing’s disease
B	Fabry’s disease
C	Parkinson’s disease
D	Kwashiorkor and marasmus

Question 15

A vegetable source of protein is

A	Egg plant
B	Soyabean
C	Tree of the Heaven
D	Devil’s dung

Question 16

Oxaloacetate is converted to aspartic acid by

A	Reductase
B	Oxidase
C	Transminase
D	Catalase

Question 17

Deficiency of biotin results in decrease in

A	Amino acid synthesis
B	Lipid synthesis
C	Kidney
D	Fatty acid synthesis

Question 18

The precursor of bile salts, sex hormones and vitamin D is

A	Diosgenin
B	Cholesterol
C	Campesterol
D	Ergosterol

Question 19

Unsaturated fatty acids is known as

A	Non-essential fatty acids
B	Essential fatty acids
C	Cerebrosides
D	Phospholipids

Question 20

Biuret test is specific for

A	Two peptide linkage
B	Phenolic group
C	Imidazole ring
D	None of these

Question 21

Most of calcium is present in bone, but 2% present in soft tissue and the blood is called

A	Calcinated blood
B	Solidified blood
C	Physiological blood
D	Colloidal blood

Question 22

Calcium present with protein is known as free while in salt form is called as

A	Bound
B	Precipitated
C	Solid
D	Polymorphs

Question 23

The following ions help in enzymatic transfer of phosphate from ATP to pyruvic acid:

A	Sodium
B	Calcium
C	Magnesium
D	Potassium

Question 24

International enzyme commission classifies enzymes into

A	Three classes
B	Six classes
C	Four classess
D	Ten classes

Question 25

Michaelis – Menten equation is used to explain the effect of substrate concentration on

A	Carbohydrate
B	Enzyme
C	Lipid
D	Protein

Question 26

The pH at which an enzyme has maximum activity is known as

A	Isoelectric pH
B	Optimum pH
C	Low pH
D	High pH

Question 27

Degradation of proteins to amino acids, glucose from carbohydrates and fatty acids from lipids is known as

A	Anabolism
B	Metabolism
C	Catabolism
D	Cretinism

Question 28

During glycolysis of glucose the energy liberated in the absence of oxygen is known as

A	Oxygenesis
B	Glyconeogenesis
C	Glycogenolysis
D	Anaerobic fermentation

Question 29

Deficiency of urea cycle enzymes results into accumulation of citrulline argininosuccinate arginine in the liver resulting in increasing concentration of …….. in the blood.

A	Calcium
B	Sodium
C	Ammonia
D	Lipid

Question 30

Accumulation of trytophan in blood is known as

A	Pompe’s disease
B	Wilson’s disease
C	Wolman’s disease
D	Hartnup’s disease

Question 31

Lymphocytes are responsible for the formation of

A	Serum
B	Plasma
C	Antibody
D	Calcium

Question 32

Platelets contain an enzyme which has important role in clotting in blood. This enzyme is known as

A	Cholinesterase
B	Transaminase
C	Decarboxylase
D	Thrombokinase

Question 33

Treatment of pentoses with a concentrated mineral acid yields a cyclic aldehyde known as

A	Pentaldehyde
B	Cyclopental
C	Hexaldehyde
D	Furfural

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See all quizzes of PROTEINS AND PROTEIN METABOLISM- Part 24 here:

1 Isoelectric pH is that pH at which protein
is electrically:
(A) Neutral (B) Anionic
(C) Cationic (D) None of these
2. About 6.25 g of haemoglobin is produced
and destroyed in the body each day and the
total amount of haemoglobin in a normal
healthy 70 kg weighing male adult is
(A) 250 g (B) 150 g
(C) 100 g (D) 70 g
3. Pancreatic juice contains all of the
following except
(A) Trypsinogen (B) Lipase
(C) Cholecystokinin (D) Chymnotrypsinogen
4. The milk protein in the stomach in an adult
is digested by
(A) Pepsin (B) Rennin
(C) HCl (D) Chymotrypsinogen
5. Carboxypeptidase, an enzyme of
pancreatic juice, contains
(A) Mn (B) Zinc
(C) Magnesium (D) Manganese
6. The zymogen from trypsinogen of
pancreatic juice is converted to active
trypsin by
(A) Peisin (B) Enterocrinin
(C) Enterokinase (D) Rennin
7. Inactive zymogens are precursors of all
the following gastrointestinal enzymes
except
(A) Carboxypeptidase (B) Pepsin
(C) Amino peptidase (D) Chymotrypsin

8. Rennin acts on casein of milk in infants in
presence of
(A) Mg++ (B) Zn++
(C) Co++ (D) Ca++
9. All the following are true about phenylketonuria
except
(A) Deficiency of phenylalanine hydroxylase
(B) Mental retardation
(C) Increased urinary excretion of p-hydroxyphenyl
pyruvic acid
(D) Decrease serotonin formation
10. Which of the amino acid produces a
vasodilator on decarboxylation?
(A) Glutamin acid (B) Histidine
(C) Ornithine (D) Cysteine
11. Neutral amino acid is
(A) Leucine (B) Lysine
(C) Aspartic acid (D) Histidine
12. The amino acid containing hydroxy group:
(A) Glycine (B) Isoleucine
(C) Arginine (D) Thereonine
13. The amino acid which synthesizes many
hormornes:
(A) Valine (B) Phenylalanine
(C) Alanine (D) Histidine
14. Insulin degradation of disulfide bond
formation is effected by
(A) Pyruvate dehydrogenase
(B) Xylitol reductase
(C) Gutathione reductase
(D) Xanthine oxidase
15. A protein reacts with biuret reagent which
indicates 2 or more
(A) Blood clotting (B) Peptide bond
(C) Disulphide bonds (D) Hydrophobic bonds
16. In many proteins the hydrogen bonding
produces a regular coiled arrangement
which is called as
(A) β-Helix (B) α-Helix
(C) Both (A) and (B) (D) Spiral
17. The milk protein in the stomach of the
infants is digested by
(A) Pepsin (B) Trypsin
(C) Chymotrypsin (D) Rennin
18. Protein anabolism is stimulated by
(A) ACTH (B) Testosterone
(C) Glucagon (D) Epinephrine
19. The number of helices present in a collagen
molecule is
(A) 1 (B) 2
(C) 3 (D) 4
20. Which bond is present in the primary
structure of protein?
(A) Ester (B) Hydrogen
(C) Ionic bond (D) Peptide
21. Sakaguchi reaction is specific for
(A) Guanidine group (B) Phenolic group
(C) Carboxylic group (D) None of these
22. With the exception of glycine all amino
acids found in protein are
(A) Isocitrate dehydrogenase
(B) Fumarase
(C) Succinate thiokinase
(D) ATPase
23 In protein structure the α-helix and β-
pleated sheets are example of
(A) Primary structure (B) Secondary structure
(C) Tertiary structure (D) Quaternary structure
24. An essential amino acid in man is
(A) Proline (B) Threonine
(C) Asparagine (D) Tyrosine
25. An amino acid that does not form an α-
helix is
(A) Asparagine (B) Tyrosine
(C) Tryptophan (D) Proline
26. The protein present in hair is
(A) Elastin (B) Prolamine
(C) Keratin (D) Gliadin

27. Plasma protein can be separated by
(A) Salting out with (NH4)2SO4
(B) Ultracentrifugation
(C) Immuno electrophoresis
(D) All of these
28. RNA does not contain
(A) Uracil
(B) Adenine
(C) Hydroxy methyl cytosine
(D) Phosphate
29. In mammalian cells, ribosomal RNA is
produced mainly in the
(A) Nucleus
(B) Nucleolus
(C) Ribosome
(D) Golgi apparatus
30. Which co-enzyme is not involved in
oxidative decarboxylation of pyruvic
acid?
(A) TPP (B) Mg++
(C) Biotin (D) CoA-SH
31. A polymeric unit of starch which has a
branched structure is
(A) Glucose (B) Amylopectin
(C) Isomaltose (D) Amylose
32 The repeating unit in hyaluronic acid is
(A) Glucuronic acid and Galactosamine
(B) Glucuronic acid are glucosamine
(C) Glucuronic acid and N-acetyl glucosamine
(D) Glucuronic acid and N-acetyl galactosamine
33 The repeating disaccharide unit in
celluslose is
(A) Sucrose (B) Maltose
(C) Dextrose (D) Cellobiose

PROTEINS AND PROTEIN METABOLISM

[MCQ] PROTEINS AND PROTEIN METABOLISM- Part 24

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PROTEINS AND PROTEIN METABOLISM- Part 23

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