Cell Wall and NucleusPractice Questions & MCQs
Practice Cell Wall and Nucleus questions from The Fundamental Unit of Life (Class 9 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Cell Wall and NucleusQuiz - Solve & Score
Q1. A geneticist studies the onion in his garden. If each of its body cells carries 16 chromosomes inside the nucleus, how many chromosomes will be packed into one of its gametes?
- A.7
- B.8
- C.32
- D.16
Answer: B. 8
Body (somatic) cells are diploid with 16 chromosomes; gametes are formed by halving this number. Gamete chromosome number = 16 / 2 = 8.
Q2. In a biology lab a researcher counts the chromosomes of a fruit fly. If each of its body cells carries 8 chromosomes inside the nucleus, how many chromosomes will be packed into one of its gametes?
- A.16
- B.4
- C.8
- D.3
Answer: B. 4
Body (somatic) cells are diploid with 8 chromosomes; gametes are formed by halving this number. Gamete chromosome number = 8 / 2 = 4.
Q3. A vet examines cells taken from a domestic dog. If each of its body cells carries 78 chromosomes inside the nucleus, how many chromosomes will be packed into one of its gametes?
- A.39
- B.156
- C.38
- D.78
Answer: A. 39
Body (somatic) cells are diploid with 78 chromosomes; gametes are formed by halving this number. Gamete chromosome number = 78 / 2 = 39.
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