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BIOLOGY MCQs

Total Questions : 2561 | Page 9 of 257 pages
Question 81. What base does guanine pair with?
  1.    Adenine
  2.    Thymine
  3.    Uracil
  4.    Cytosine
 Discuss Question
Answer: Option D. -> Cytosine
Question 82. Which describes the correct pairing of DNA bases?
  1.    Guanine - cytosine
  2.    Adenine - cytosine
  3.    Guanine - thymine
  4.    Thymine - cytosine
 Discuss Question
Answer: Option A. -> Guanine - cytosine
Question 83. Sex determination of child is done by the chromosome of
  1.    Father
  2.    Mother
  3.    Both father and mother
  4.    None of these
 Discuss Question
Answer: Option A. -> Father
Question 84. The principle of dominance states that
  1.    Some alleles are dominant, while others are recessive
  2.    All alleles are recessive
  3.    All alleles are dominant
  4.    Alleles are neither dominant nor recessive
 Discuss Question
Answer: Option A. -> Some alleles are dominant, while others are recessive
Question 85. Which chemical is not found in DNA nucleotides?
  1.    Thymine
  2.    Uracil
  3.    Adenine
  4.    All of the above
 Discuss Question
Answer: Option B. -> Uracil
Question 86. Nitrogenous bases in DNA and RNA?
  1.    Adenine
  2.    Cytosine
  3.    Guanine
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 87. It is the study of hereditary characters transmitted from parents to offspring.
  1.    Genetics
  2.    Evolution
  3.    Embryology
  4.    Molecular Biology
 Discuss Question
Answer: Option A. -> Genetics
Question 88. The inherited traits of an organism are controlled by
  1.    DNA
  2.    Enzymes
  3.    Nucleotides
  4.    RNA
 Discuss Question
Answer: Option A. -> DNA
Question 89. Which is the correct pair of inherited chromosomes for the child to be a girl?
  1.    X from father and Y from mother
  2.    Y from father and X from mother
  3.    Y from father and Y from mother
  4.    X from father and X from mother
 Discuss Question
Answer: Option D. -> X from father and X from mother
Question 90. Which chromosomes are identical to each other on the basis of their morphology, position of centromere and other characteristics?
  1.    Autosome chromosomes
  2.    Sex chromosomes
  3.    Heterozygous chromosomes
  4.    Homologous chromosomes
 Discuss Question
Answer: Option D. -> Homologous chromosomes

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