MCQs Zoology-22 Posted on 2025-11-122025-12-03Author admin 0 Table of Contents Toggle MCQs Zoology-22MCQs Zoology-22 MCQs Zoology-22 1. ___________ first coined the term “epigenetics” in the 1940s Robin Holliday Conrad H. Waddington Arthur Riggs Barbara McClintock 2. The first chemical mutagen ever discovered was __________. Mustard gas Nitrosoguanidine 5-Bromouracil Ethyl Methanesulfonate 3. Non-coding RNAs, such as microRNAs (miRNAs), can be considered part of epigenetic regulation because they___________ Code for histone proteins Regulate gene expression at the post-transcriptional level without altering the DNA sequence Are the primary components of chromatin Directly repair DNA damage 4. What is the benefit of metameric segmentation in annelids? Enhanced sensory perception Improved locomotion and burrowing Better defense mechanisms Increased reproductive success 5. The central dogma of molecular biology describes the flow of genetic information as _____________ DNA → RNA → Protein DNA → Protein → RNA RNA → DNA → Protein Protein → DNA → RNA 6. The primitive gut, i.e., enteron, develops during which stage of embryonic development? Gastrulation Morphogenesis Neurulation Organogenesis 7. A segment of DNA that codes for a specific protein or functional RNA molecule, and thus determines a specific trait, is called a(n) ———— Nucleotide Gene Chromosome Allele 8. Dolly, the first cloned sheep, was produced in __________ 2006 1990 1996 1999 9. What is the defining characteristic of imprinted genes? Expression determined by parental origin, leading to monoallelic expression Permanently inactivated in all cells Code for epigenetic silencing machinery High rate of spontaneous mutation 10. Inbreeding depression is primarily caused by __________ Gene flow Increased heterozygosity Accumulation of deleterious recessive alleles Overdominance Loading … MCQs Zoology-22
