Home › Quizzes › Life Sciences

Life Sciences

lifescience ugc net csir Life Sciences

15 Questions Published
Play Quiz Practise this topic out loud

Questions

Question 1 Multiple Choice (Single Answer)

Retinoic acid is derived from ___________.

  1. vitamin D
  2. vitamin A
  3. pregnenolone
  4. progesterone
  5. cholesterol
Question 2 Multiple Choice (Single Answer)

Which of the following is a non polar covalent bond?

  1. C–O
  2. C–H
  3. C–Cl
  4. C–Br
  5. C–I
Question 3 Multiple Choice (Single Answer)

Which is the peculiar feature of chemical synthesis of oligonucleotides?

  1. DNA polymerase is involved in chemical synthesis.
  2. Template is required for oligonucleotide synthesis.
  3. Synthesis of oligonucleotide in 5'-3' direction.
  4. Synthesis of oligonucleotides in 3'-5' direction.
  5. None of the above
Question 4 Multiple Choice (Single Answer)

Melting point (Tm) of the DNA is affected by

  1. G-C content
  2. Presence of monovalent cations
  3. A-T content
  4. Both (1) and (2)
  5. All of the above
Question 5 Multiple Choice (Single Answer)

Cell organelle spherosomes are involved in ______________.

  1. digestion of cell
  2. synthesis of protein
  3. storage and synthesis of fat
  4. removal of hydrogen peroxide
  5. involved in photorespiration
Question 6 Multiple Choice (Single Answer)

Which of the following is not a plasma protein?

  1. Haemoglobin
  2. Beta lipoprotein
  3. Fibrinogen
  4. Alpha lipoprotein
  5. Gama globulin
Question 7 Multiple Choice (Single Answer)

Iron sulphur complexes are the prosthetic group found in protein complexes of respiratory chain. It is classified based on the composition of iron, sulphur and amino acid. In this, Riske centre consist of __________.

  1. 1Fe, 4S, and 4 cystine
  2. 2Fe, 6S, and 4 cystine
  3. 4Fe, 7S, and 4 cystine
  4. 2Fe, 6S, and 2 cystine and 2 histidine
  5. None of the above
Question 8 Multiple Choice (Single Answer)

Formation of polar lobe, which influences cell differentiation is seen in the developmental stage of which organism?

  1. Snails
  2. Amphibian
  3. Mammals
  4. Drosophila
  5. Reptiles
Question 9 Multiple Choice (Single Answer)

Which of the following embryonic layers produces human chorionic gonadotropin (HCG)?

  1. Trophoblast
  2. Primitive streak
  3. Hypoblast
  4. Epiblast
  5. Chorion
Question 10 Multiple Choice (Single Answer)

Which of the following cellular organelles takes part in storage and synthesis of fat?

  1. Mitochondria
  2. Ribosome
  3. Golgi body
  4. Peroxisome
  5. Spherosome
Question 11 Multiple Choice (Single Answer)

Chromatin diminution can be seen in

  1. Oocytes of amphibians
  2. Depteran flies
  3. Parascaris
  4. Down syndrome
  5. Salivary gland of Drosophila
Question 12 Multiple Choice (Single Answer)

Which of the following statements is/are true about the net charge on the protein according to change in pH?

  1. In acidic pH, proteins are positively charged.
  2. Alkaline pH proteins are negatively charged.
  3. At isoelectric point, the net charge on protein is zero.
  4. Both 1 and 2
  5. All of the above
Question 13 Multiple Choice (Single Answer)

Which of the following is not the property of aldosterone?

  1. It is a mineralocorticoid hormone.
  2. It is produced form progesterone.
  3. It is responsible for raise in blood pressure and fluid volume.
  4. It is responsible for intake of Na+ ions.
  5. It is responsible for changes associated with luteal phase of menstrual cycle.
Question 14 Multiple Choice (Single Answer)

_______ leads to hyperchromic effect of DNA.

  1. Increased absorption of light
  2. Denaturation of DNA
  3. Hydrogen bonding
  4. Van der Waals force
  5. None of the above
Question 15 Multiple Choice (Single Answer)

Which of the following types of intercalation is not involved in interaction between DNA and DNA binding agents?

  1. Insertion of a planar heterocyclic aromatic ring between the base pairs of the DNA double helix.
  2. Threading interaction
  3. Covalent bonding
  4. Both (1) and (2)
  5. All of the above
← Back to Quizzes