15 Questions
Which of the following represents the correct order of components in a nucleotide?
Sugar, Base, Phosphate
Which of the following pairs represents purine bases?
Guanine and Adenine
During DNA replication, which tautomeric shift can lead to base-pairing errors?
Keto-Enol Tautomerism
What type of bond is responsible for stabilizing the helical structure of DNA?
Hydrogen Bond
Which enzyme is primarily responsible for proofreading and correcting errors during DNA replication?
DNA Polymerase
Which of the following represents a non-Watson-Crick base pair with guanine in DNA?
Uracil
During DNA replication, which strand is synthesized discontinuously in the 5' to 3' direction?
Lagging Strand
How many hydrogen bonds are formed between guanine (G) and cytosine (C) in DNA?
Three
Which tautomeric shift during DNA replication can lead to base-pairing errors?
Keto-Enol Tautomerism
In RNA, what base pairs with thymine?
Uracil
Which of the following best describes a transversion mutation?
Substitution of a pyrimidine with a purine
What is the primary characteristic of a missense mutation?
The protein has a different amino acid sequence
What is the consequence of a frameshift mutation?
It alters the reading frame, leading to a completely different protein
Which of the following oxidative lesions is commonly repaired by the base excision repair (BER) pathway?
8-oxoguanine
What is the consequence of a nonsense mutation?
The protein is shortened prematurely
Test your knowledge about DNA structure and replication with these multiple-choice questions. Challenge yourself on topics such as nucleotide components, nitrogenous bases, and tautomeric shifts during DNA replication.
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