MCQs Plant Breeding and Genetics-43 Posted on 2025-11-03Author admin 0 1. Primary function of pollen is to _______ Produce female gametes Protect the embryo Produce sperm cells Facilitate fertilization 2. The primary product of photolysis in light reactions is _________ Oxygen NADPH ATP Glucose 3. During photosynthesis, energy is converted from ___ energy into ___ energy, stored in the bonds of glucose Kinetic; Chemical Light; Chemical Mechanical; Light Chemical; Chemical 4. What is the defining characteristic of imprinted genes? They code for the enzymatic machinery involved in epigenetic silencing Their expression is determined by their parental origin, leading to monoallelic expression They have an exceptionally high rate of spontaneous mutation They are permanently inactivated in all cells of the body 5. Which of the following nitrogenous bases is NOT found in DNA? Adenine Uracil Thymine Guanine 6. ___________ is the ability of an organism to produce different phenotypes in response to different environmental conditions None of these Dependence on external chemicals Phenotypic plasticity Inability to sense the environment 7. The central dogma of molecular biology describes the flow of genetic information as_________- DNA → RNA → Protein RNA → DNA → Protein Protein → DNA → RNA DNA → Protein → RNA 8. In plants true roots first evolved among _________ Bryophytes Pteridophytes Angiosperms Gymnosperms 9. 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 10. CGIAR Genebank at _____________ is primarily responsible for conserving the world’s largest collection of rice germplasm IRRI, Philippines CIMMYT, Mexico ICARDA, Lebanon CIP, Peru Loading …
