Cellular Reproduction(Cell Biology ) Questions and Answers

Question 1. How many types of replication models were considered before the semiconservative nature of DNA replication was confirmed?
  1.    1
  2.    2
  3.    3
  4.    4
Explanation:-
Answer: Option C. -> 3
Answer: (c).3
Question 2. The bacterial oriC is the __________________
  1.    specific sequence
  2.    transcription factor
  3.    enzyme
  4.    polypeptide
Explanation:-
Answer: Option A. -> specific sequence
Answer: (a).specific sequence
Question 3. Temperature-sensitive mutants can not replicate their chromosomes at non-permissive temperatures.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option A. -> True
Answer: (a).True
Question 4. Movement of the replication fork generates ________________ in the unreplicated portion of DNA.
  1.    positive supercoils
  2.    negative supercoils
  3.    untranslated regions
  4.    amino acid substitutions
Explanation:-
Answer: Option A. -> positive supercoils
Answer: (a).positive supercoils
Question 5. Which isotopes were used by the researchers who first confirmed the semiconservative nature of DNA replication?
  1.    Nitrogen
  2.    Carbon
  3.    Oxygen
  4.    Sulfur
Explanation:-
Answer: Option A. -> Nitrogen
Answer: (a).Nitrogen
Question 6. Vertebrate eggs are typically fertilized before ___________________ is complete.
  1.    mitosis
  2.    meiosis
  3.    translation
  4.    transcription
Explanation:-
Answer: Option B. -> meiosis
Answer: (b).meiosis
Question 7. The sporic or intermediate meiosis is unrelated to gamete formation.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option A. -> True
Answer: (a).True
Question 8. Zygotic meiosis only occurs in _______________________
  1.    fungi
  2.    monera
  3.    vertebrates
  4.    mammals
Explanation:-
Answer: Option A. -> fungi
Answer: (a).fungi
Question 9. Chiasmata are ____ shaped structures.
  1.    X
  2.    U
  3.    V
  4.    Z
Explanation:-
Answer: Option A. -> X
Answer: (a).X
Question 10. Leptotene and zygotene are the stages that occur during _____________ of meiosis.
  1.    anaphase
  2.    prophase II
  3.    metaphase II
  4.    telophase
Explanation:-
Answer: Option B. -> prophase II
Answer: (b).prophase II
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