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Biomolecules · Question 37

AIPMT 2008MCQEasy📈 Topic in 0% papers+4−1
1

Which of the following is an amine hormone?

  1. Insulin
  2. Progesterone
  3. Thyroxine
  4. Oxypurine

Answer

(3) Thyroxine

Solution

As per NCERT, hormones have diverse chemical structures: steroids (e.g. progesterone, oestrogens), polypeptides (e.g. insulin, endorphins) and amino acid derivatives (e.g. epinephrine, norepinephrine). Thyroxine, produced in the thyroid gland, is an iodinated derivative of the amino acid tyrosine.

Insulin – polypeptide hormone; Progesterone – steroid hormone; Oxypurine – a purine base derivative, not a hormone.

Thyroxine is an amine (amino acid derived) hormone.

Answer: (3)

AIPMT 2008

Keep practising — Biomolecules

2

RNA and DNA are chiral molecules, their chirality is due to

  1. chiral bases
  2. chiral phosphate ester units
  3. D-sugar component
  4. L-sugar component
AIPMT 2007
3

Which of the following vitamins is water-soluble?

  1. Vitamin E
  2. Vitamin K
  3. Vitamin A
  4. Vitamin B
AIPMT 2007
4

The human body does not produce

  1. enzymes
  2. DNA
  3. vitamins
  4. hormones
AIPMT 2006
5

Which one of the following is a peptide hormone?

  1. Adrenaline
  2. Glucagon
  3. Testosterone
  4. Thyroxine
AIPMT 2006
6

During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process Proteins enzyme (A) Polypeptide enzyme (B) Amino acids are respectively

  1. invertase and zymase
  2. amylase and maltase
  3. diastase and lipase
  4. pepsin and trypsin
AIPMT 2006
7

Which functional group participates in disulphide bond formation in proteins?

  1. Thioester
  2. Thioether
  3. Thiol
  4. Thiolactone
AIPMT 2005
8

The cell membranes are mainly composed of

  1. fats
  2. proteins
  3. phospholipids
  4. carbohydrates
AIPMT 2005
9

A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?

  1. Three
  2. Four
  3. One
  4. Two
AIPMT 2004
10

The hormone that helps in the conversion of glucose to glycogen is

  1. cortisone
  2. bile acids
  3. adrenaline
  4. insulin
AIPMT 2004
11

The correct statement in respect of protein haemoglobin is that it

  1. functions as a catalyst for biological reactions
  2. maintains blood sugar level
  3. acts as an oxygen carrier in the blood
  4. forms antibodies and offers resistance to diseases.
AIPMT 2004

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