Biomolecules (Biology)

Which of the following statements are correct regarding amino acids ? Choose the correct answer from the options given below :

1. A and B only
2. C and D only
3. B and C only
4. A and C only

The following reaction depicts the activity of a particular class of enzymes : [figure] Identify the enzyme class 'E' from the following options :

1. Isomerases
2. Ligases
3. Transferases
4. Lyases

Arrange the following elements in descending order of their contribution to percentage weight of the human body.

1. B, A, C, D
2. A, B, C, D
3. C, A, B, D
4. B, C, D, A

The protein portion of an enzyme is called:

1. Apoenzyme
2. Prosthetic group
3. Cofactor
4. Coenzyme

Which one of the following statements refers to Reductionist Biology?

1. Chemical approach to study and understand living organisms
2. Behavioural approach to study and understand living organisms
3. Physico-chemical approach to study and understand living organisms
4. Physiological approach to study and understand living organisms

Which one of the following enzymes contains 'Haem' as the prosthetic group?

1. Succinate dehydrogenase
2. Catalase
3. RuBisCO
4. Carbonic anhydrase

Name the class of enzyme that usually catalyses the following reaction : S - G + S' S + S' - G Where, G a group other than hydrogen S a substrate S' another substrate

1. Transferase
2. Ligase
3. Hydrolase
4. Lyase

Lecithin, a small molecular weight organic compound found in living tissues, is an example of:

1. Amino acids
2. Phospholipids
3. Glycerides
4. Carbohydrates

The cofactor of the enzyme carboxypeptidase is:

1. Zinc
2. Niacin
3. Flavin
4. Haem

Inhibition of Succinic dehydrogenase enzyme by malonate is a classical example of:

1. Cofactor inhibition
2. Feedback inhibition
3. Competitive inhibition
4. Enzyme activation

Regarding catalytic cycle of an enzyme action, select the correct sequential steps : Choose the correct answer from the options given below :

1. E, A, D, C, B
2. A, E, B, D, C
3. B, A, C, D, E
4. E, D, C, B, A

Which of the following is a nucleotide?

1. Uridine
2. Adenylic acid
3. Guanine
4. Guanosine

Ligases is a class of enzymes responsible for catalysing the linking together of two compounds. Which of the following bonds is not catalysed by it?

1. C – C
2. P – O
3. C – O
4. C – N

Which of the following are not fatty acids? Choose the correct answer from the options given below :

1. C, D and E only
2. A and B only
3. A, D and E only
4. B and C only

Which of the following graphs depicts the effect of substrate concentration on velocity of enzyme catalysed reaction?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Enzymes that catalyse the removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds, are known as :

1. Transferases
2. Oxidoreductases
3. Dehydrogenases
4. Lyases

Cellulose does not form blue colour with Iodine because

1. It is a helical molecule
2. It does not contain complex helices and hence cannot hold iodine molecules
3. It breaks down when iodine reacts with it
4. It is a disaccharide

Malonate inhibits the growth of pathogenic bacteria by inhibiting the activity of

1. Amylase
2. Lipase
3. Dinitrogenase
4. Succinic dehydrogenase

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

1. Both Statement I and Statement II are false.
2. Statement I is true but Statement II is false.
3. Statement I is false but Statement II is true.
4. Both Statement I and Statement II are true.

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

1. Both Statement I and Statement II are false.
2. Statement I is true but Statement II is false.
3. Statement I is false but Statement II is true.
4. Both Statement I and Statement II are true.

Read the following statements on lipids and find out correct set of statements : Choose the correct answer from the options given below:

1. A, B and C only
2. A, D and E only
3. C, D and E only
4. A, B and D only

A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is C6H12O6 then what is the formula for maltose?

1. C12H20O10
2. C12H24O12
3. C12H22O11
4. C12H24O11

Primary proteins are also called as polypeptides because :

1. They can assume many conformations
2. They are linear chains
3. They are polymers of peptide monomers
4. Successive amino acids are joined by peptide bonds

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

1. Statement I is incorrect but Statement II is correct
2. Both Statement I and Statement II are correct
3. Both Statement I and Statement II are incorrect
4. Statement I is correct but Statement II is incorrect

In the enzyme which catalyses the breakdown of: 2H2O2 2H2O + O2 the prosthetic group is :

1. Niacin
2. Nicotinamide adenine dinucleotide
3. Haem
4. Zinc

Which of the following are not secondary metabolites in plants?

1. Rubber, gums
2. Morphine, codeine
3. Amino acids, glucose
4. Vinblastin, curcumin

Identify the incorrect pair

1. Drugs - Ricin
2. Alkaloids - Codeine
3. Toxin - Abrin
4. Lectins - Concanavalin A

Following are the statements with reference to 'lipids'. Choose the correct answer from the options given below.

1. B and E only
2. A and B only
3. C and D only
4. B and C only

Identify the substances having glycosidic bond and peptide bond, respectively in their structure

1. Glycerol, trypsin
2. Cellulose, lecithin
3. Inulin, insulin
4. Chitin, cholesterol

Which one of the following is the most abundant protein in the animals?

1. Collagen
2. Lectin
3. Insulin
4. Haemoglobin