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Zoology

Biomolecules

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In which of the following options, biomolecules are arranged in decreasing order w.r.t. their percentage in the total cellular mass?

Proteins, lipids, nucleic acids, carbohydrates

Proteins, nucleic acids, lipids, carbohydrates

Proteins, nucleic acids, carbohydrates, lipids

Proteins, carbohydrates, lipids, nucleic acids

Statement-1 : Transferases enzymes catalysing a transfer of a group G (other than hydrogen) between a pair of substrates S and S'
Statement-II : Lyases enzymes catalyse removal of groups from substrate by mechanism other than hydrolysis and leaving single bonds.

Both statement-I and statement-II are correct

Both statement-I and statement-II are incorrect

Statement-I is incorrect but statement-II is correct

Statement-I is correct but statement-II is incorrect

Match List-I with List-II

List I	List II
ACodeine	iPolysaccharide
BAdenosine	iiAlkaloid
CInulin	iiiNucleoside
DTrypsin	ivProtein

A-II, B-III, C-IV, D-I

A-III, B-II, C-IV, D-I

A-II, B-III, C-I, D-IV

Consider the following statements regarding proteins and select the correct combination:
A. The first amino acid in a polypeptide chain is called the C-terminal amino acid.
B. Adult human hemoglobin consists of 4 subunits—two alpha types and two beta types.
C. In a proteins' tertiary structure, the peptide bonds are the only bonds stabilizing the fold.
D. Collagen is the most abundant protein in the entire biosphere.
E. The secondary structure of a protein is strictly determined by disulfide linkages.

B and D only

A, B, and D

B, C, and E

B only

Complete the analogy:
Cellulose : Cellulase :: Chitin : ________

Lysozyme

Chitinase

Proteases

Ribonuclease

Select the incorrect statement from the following.

Oxygen is the most abundant element in Earth’s crust.

Percentage of calcium is more in Earth’s crust than in human body.

Nitrogen is 3.3% in human body.

Carbon is the third most abundant element present in human body.

In mammals, carbohydrates are stored as :-

Glycogen in liver and spleen

Lactic acid in muscles

Glucose in liver

Glycogen in liver and muscles

Assertion (A): Starch gives colour with iodine but cellulose cannot be stained by iodine.
Reason (R): Cellulose does not contain complex helices cannot hold iodine molecules.

Both (A) and (R) are true and (R) is the correct explanation of (A).

Both (A) and (R) are true and (R) is not the correct explanation of (A).

(A) is true but (R) is false.

Both (A) and (R) are false.

From the statements given below regarding enzymes, choose the correct option:

A. Enzymes that catalyze the inter-conversion of optical, geometric, or positional isomers are called Isomerases.

B. Dehydrogenases catalyze the transfer of electrons from one substrate to another.

C. Hydrolases catalyze the linking of two molecules using ATP.

D. Proteases and Lipases belong to the class of Hydrolases.

E. Transferases only transfer hydrogen atoms between substrates.

Choose the correct answer from the options given below:

A, B, C only

B, C, E only

A, B, D only

C, D, E only

Match List-I with List-II.
Choose the correct answer from the options given below:

List-I (Secondary metabolite)	List-II (Category)
A Vinblastine	i Alkaloid
B Anthocyanin	ii Toxin
C Abrin	iii Drug
D Morphine	iv Pigment

A-II, B-III, C-I, D-IV

A-III, B-II, C-I, D-IV

A-III, B-IV, C-I, D-II

A-III, B-IV, C-II, D-I

Choose the incorrect statement w.r.t. lipids.

Some lipids have phosphorous and phosphorylated organic compound in them.

Phospholipids are present in the cell membrane.

Neural tissue have lipids with more complex structure.

Glycerol also known as trihydroxy propane is a complex lipid.

Identify the correctly matched pair of enzyme class and its reaction type:

Dehydrogenases – Transfer of a group of (other than hydrogen) between a pair of substrates

Hydrolases – Catalyze the linking together of two compounds

Lyases – Removal of groups from substrates by mechanisms other than hydrolysis

Isomerases – Catalyze the transfer of electrons

Select the correct option to complete the analogy w.r.t. amino acids.
Acidic : Glutamic acid :: Neutral : ______

Lysine

Valine

Arginine

Tryptophan

Select the option which is not correct with respect to Co-factor-

Catalytic activity is lost when the co-factor is removed from the enzyme

Cofactor play a crucial role in the catalytic activity of the enzyme.

Three kinds of cofactors may be identified : prosthetic groups, apoenzymes and metal ions.

Three kinds of cofactors may be identified : prosthetic groups, Co-enzymes and metal ions.

Which of the following is not a homopolymer?

Chitin

Inulin

Cellulose

Collagen

Name the class of enzymes that catalyze the removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds:

Dehydrogenases

Lyases

Hydrolases

Isomerases

Question Palette

Unattempted

Correct

Incorrect

List I

List II

ACodeine

iPolysaccharide

BAdenosine

iiAlkaloid

CInulin

iiiNucleoside

DTrypsin

ivProtein

List-I (Secondary metabolite)

List-II (Category)

Vinblastine

Alkaloid

Anthocyanin

Toxin

Abrin

iii

Drug

Morphine

Pigment