AP EAMCET (EAPCET) Botany Multiple Choice Questions (MCQs)
Molecular Biology MCQs - APEAPCET Botany
111. Which of the following is the correct structure of DNA?
a) Single-stranded helix
b) Double-stranded helix
c) Triple-stranded helix
d) Double-stranded sheet
Answer: b) Double-stranded helix
112. The packaging of DNA into a helix is mainly accomplished by:
a) Histones
b) Ribosomes
c) Transfer RNA
d) Amino acids
Answer: a) Histones
113. Who first demonstrated that DNA is the genetic material by using the transforming principle in bacteria?
a) Hershey and Chase
b) Griffith
c) Watson and Crick
d) Avery, MacLeod, and McCarty
Answer: b) Griffith
114. Which of the following is the main difference between DNA and RNA?
a) DNA contains uracil, while RNA contains thymine.
b) RNA is double-stranded, while DNA is single-stranded.
c) RNA contains ribose sugar, while DNA contains deoxyribose sugar.
d) Both RNA and DNA have the same structure.
Answer: c) RNA contains ribose sugar, while DNA contains deoxyribose sugar.
115. Which of the following is the key enzyme involved in DNA replication?
a) RNA polymerase
b) DNA polymerase
c) Ligase
d) Helicase
Answer: b) DNA polymerase
116. The process of transcription involves the synthesis of:
a) DNA from RNA
b) RNA from DNA
c) Protein from RNA
d) Protein from DNA
Answer: b) RNA from DNA
117. Which of the following types of RNA carries amino acids to the ribosome for protein synthesis?
a) mRNA
b) tRNA
c) rRNA
d) snRNA
Answer: b) tRNA
118. The genetic code is considered universal because:
a) It is the same in all organisms.
b) It is different in each organism.
c) It is only found in animals.
d) It does not vary across species.
Answer: a) It is the same in all organisms.
119. The Lac operon in bacteria is involved in the regulation of gene expression for:
a) Protein synthesis
b) Carbohydrate metabolism
c) Lipid synthesis
d) Nitrogen fixation
Answer: b) Carbohydrate metabolism
120. Which of the following correctly describes the process of translation?
a) Synthesis of RNA from DNA
b) Conversion of mRNA into a protein
c) Replication of DNA
d) Synthesis of tRNA from DNA
Answer: b) Conversion of mRNA into a protein
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