Molecular Basis of Inheritance
Bihar Board · Class 12 · Biology
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What is the complementary base pair for Adenine in DNA?
The process of making RNA from DNA is called:
How many hydrogen bonds are formed between Guanine and Cytosine?
The genetic code is read in groups of how many nucleotides?
Sample Questions
Which of the following are components of a nucleotide?
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Nitrogenous base, Pentose sugar, Phosphate group
A nucleotide consists of three components: a nitrogenous base (purine or pyrimidine), a pentose sugar (ribose in RNA or deoxyribose in DNA), and a phosphate group. Amino acids are components of proteins, and fatty acids are components of lipids.
Which of the following statements about DNA replication are correct?
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It is semiconservative, Both strands serve as templates, It requires DNA polymerase, It produces identical copies
DNA replication is semiconservative (each new DNA has one old and one new strand), uses both strands as templates, requires DNA polymerase enzyme, and produces identical copies. In eukaryotes, replication occurs in the nucleus, not cytoplasm.
Which enzyme is responsible for joining DNA fragments during replication?
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DNA ligase
DNA ligase joins the discontinuously synthesized DNA fragments (Okazaki fragments) on the lagging strand during replication. DNA polymerase synthesizes DNA, RNA polymerase makes RNA, and helicase unwinds DNA.
Which of the following are stop codons?
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UAA, UAG, UGA
UAA, UAG, and UGA are the three stop codons that signal the termination of protein synthesis. AUG is the start codon that codes for methionine, and UUU codes for phenylalanine.
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