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Biology Mixed Test - 3

Mixed biology test covering enzymes, DNA, hormones, and vitamins.

20 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Enzymes that catalyze the same reaction but have different chemical compositions and physical properties are called

  1. proenzymes
  2. apoenzymes
  3. isozymes
  4. coenzymes
Question 2 Multiple Choice (Single Answer)

The active site of an enzyme

  1. looks like a lump projecting from the surface of an enzyme
  2. forms no chemical bonds with substrates
  3. determines the specificity of an enzyme by its structure
  4. never changes shape
Question 3 Multiple Choice (Single Answer)

In B-DNA, number of nucleotides per turn is

  1. 11
  2. 10
  3. 12
  4. 9
Question 4 Multiple Choice (Single Answer)

Hormone relaxin is secreted by

  1. corpus luteum
  2. ovary
  3. thymus
  4. pineal
Question 5 Multiple Choice (Single Answer)

Implantation of fertilized egg or young embryo occurs under the influence of

  1. LH
  2. Progesterone
  3. Oxytocin
  4. FSH
Question 6 Multiple Choice (Single Answer)

Deficiency of thyroxine or hypothyroidism in adults results in

  1. diabetes mellitus
  2. diabetes insipidus
  3. myxoedema
  4. exopthalmic goiter
Question 7 Multiple Choice (Single Answer)

Adernal cortex is controlled in its activity by a hormone of pituitary known as

  1. FSH
  2. ACTH
  3. TSH
  4. ADH
Question 8 Multiple Choice (Single Answer)

Metamorphosis in tadpole of frog is accelerated by

  1. calcium
  2. thyroid hormone
  3. salinity of water
  4. low pH
Question 9 Multiple Choice (Single Answer)

Oversecretion of growth hormone in adult produces

  1. gigantism
  2. acromegaly
  3. grave's disease
  4. gull's disease
Question 10 Multiple Choice (Single Answer)

Which vitamin is synthesized in human body with the help of sun light?

  1. Vitamin A
  2. Vitamin K
  3. Vitamin C
  4. Vitamin D
Question 11 Multiple Choice (Single Answer)

Vitamin necessary for the synthesis of retinal pigment rhodopsin is

  1. vitamin C
  2. vitamin A
  3. vitamin D
  4. vitamin K
Question 12 Multiple Choice (Single Answer)

Which of the following is not a fat-soluble vitamin?

  1. Vitamin A
  2. Vitamin C
  3. Vitamin K
  4. Vitamin D
Question 13 Multiple Choice (Single Answer)

Deficiency of which vitamin causes beri beri?

  1. Vitamin A
  2. Vitamin B1
  3. Vitamin C
  4. Vitamin D
Question 14 Multiple Choice (Single Answer)

Chemical name of vitamin C is

  1. thiamin
  2. calciferol
  3. retinol
  4. ascorbic acid
Question 15 Multiple Choice (Single Answer)

Deficiency of vitamin C causes

  1. beri beri
  2. scurvey
  3. xerophthalmia
  4. pernicious anaemia
Question 16 Multiple Choice (Single Answer)

Which of the following elements is found in thyroid hormones?

  1. Calcium (Ca)
  2. Chlorine (Cl)
  3. Iodine (I)
  4. Iron (Fe)
Question 17 Multiple Choice (Single Answer)

Anti-rickets vitamin is

  1. A or retinol
  2. D or calciferol
  3. K or menadione
  4. E or tocopherol
Question 18 Multiple Choice (Single Answer)

Element necessary for blood clotting is

  1. chlorine (Cl)
  2. calcium (Ca)
  3. potassium (K)
  4. iodine (I)
Question 19 Multiple Choice (Single Answer)

The vitamin found in amla, citrus fruit, etc. is

  1. vitamin A
  2. vitamin K
  3. vitamin C
  4. vitamin D
Question 20 Multiple Choice (Single Answer)

The simplest amino acid is

  1. alanine
  2. glycine
  3. lysine
  4. tyrosine
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