Questions 13 to 16: Assertion and Reason
Question 13:
Assertion (A): The genetic material of a bacteriophage can integrate into the host bacterial chromosome.
Reason (R): Integration helps the bacteriophage DNA replicate along with the host DNA during cell division.
Options:
- (A) Both A and R are true, and R is the correct explanation of A.
- (B) Both A and R are true, but R is not the correct explanation of A.
- (C) A is true, but R is false.
- (D) A is false, but R is true.
Question 14:
Assertion (A): Genetic recombination during meiosis leads to variation in offspring.
Reason (R): Crossing over between homologous chromosomes occurs during prophase I of meiosis.
Options:
- (A) Both A and R are true, and R is the correct explanation of A.
- (B) Both A and R are true, but R is not the correct explanation of A.
- (C) A is true, but R is false.
- (D) A is false, but R is true.
Question 15:
Assertion (A): Deforestation leads to a decrease in biodiversity.
Reason (R): Trees provide a habitat and food sources for a wide range of organisms.
Options:
- (A) Both A and R are true, and R is the correct explanation of A.
- (B) Both A and R are true, but R is not the correct explanation of A.
- (C) A is true, but R is false.
- (D) A is false, but R is true.
Question 16:
Assertion (A): In a population obeying Hardy-Weinberg equilibrium, allele frequencies remain constant.
Reason (R): Hardy-Weinberg equilibrium requires no mutation, migration, genetic drift, selection, or random mating.
Options:
- (A) Both A and R are true, and R is the correct explanation of A.
- (B) Both A and R are true, but R is not the correct explanation of A.
- (C) A is true, but R is false.
- (D) A is false, but R is true.
Class 12 Biology Sample Paper 2023-24
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