EASY
Earn 100
Reducing sugars are simple carbohydrates having
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Important Questions on Chemical Constituents of Living Cells
HARD
The activity of a certain protein is dependent on its phosphorylation. A mutation in its gene changed a single amino acid which affected the function of the molecule. Which amino acid change is most likely to account for this observation?
EASY
Optical activity of DNA is due to its:
MEDIUM
Which of the following amino acids is NOT involved in gluconeogenesis?
HARD
Two tubes labelled 'P' and 'Q' contain foodstuff. Tube 'P' gave a positive test with Benedict's solution while tube 'Q' gave a positive test with nitric acid. Which of the following is correct?
EASY
How many different proteins consisting of 100 amino acids can be formed from 20 different amino acids?
HARD
Which one of the following techniques is used for the detection of proteins?
MEDIUM
A protein contains a single binding site for a molecule (ligand), whose molecular weight is . Assuming high affinity and physiologically irreversible binding the amount of the ligand required to occupy all the binding sites in protein will be:
MEDIUM
Match the following
| (a) | Inhibitor of catalytic activity | (i) | Ricin |
| (b) | Possess peptide bonds | (ii) | Malonate |
| (c) | Cell wall material in fungi | (iii) | Chitin |
| (d) | Secondary metabolite | (iv) | Collagen |
Choose the correct option from the following
MEDIUM
Choose the CORRECT combination of statements given below related to cysteine residue in proteins.
i. Cysteine can be linked to tyrosine by S-O bond.
ii. Cysteine can be linked to another cysteine by S-S bond.
iii. Cysteine can complex with
iv. Cysteine can be linked to methionine by S-S bond
EASY
Which of the following is the least likely to be involved in stabilizing the three-dimensional folding of most proteins?
MEDIUM
Which of the following is not polymeric?
EASY
In a protein molecule various amino acids are linked together by:
MEDIUM
Phospholipids are formed by the esterification of:
EASY
Identify the substances having glycosidic bond and peptide bond, respectively in their structure.
EASY
Identify the statement which is incorrect.
EASY
The reaction of concentrated sulphuric acid with carbohydrates is an example of
EASY
Which one of the following pairs of molecules never forms a hydrogen bond between them?
MEDIUM
The Fischer presentation of D-glucose is given below
The correct structure(s) of glucopyranose is(are)
EASY
Which one of the following statements is wrong?
