MCQs Plant Breeding and Genetics-43 Posted on 2025-11-03Author admin 0 1. CGIAR Genebank at _____________ is primarily responsible for conserving the world’s largest collection of rice germplasm ICARDA, Lebanon CIP, Peru IRRI, Philippines CIMMYT, Mexico 2. In plants true roots first evolved among _________ Bryophytes Gymnosperms Angiosperms Pteridophytes 3. The central dogma of molecular biology describes the flow of genetic information as_________- Protein → DNA → RNA DNA → RNA → Protein RNA → DNA → Protein DNA → Protein → RNA 4. ___________ is the ability of an organism to produce different phenotypes in response to different environmental conditions Phenotypic plasticity Dependence on external chemicals None of these Inability to sense the environment 5. Primary function of pollen is to _______ Protect the embryo Produce female gametes Facilitate fertilization Produce sperm cells 6. What is the defining characteristic of imprinted genes? They have an exceptionally high rate of spontaneous mutation They are permanently inactivated in all cells of the body Their expression is determined by their parental origin, leading to monoallelic expression They code for the enzymatic machinery involved in epigenetic silencing 7. Which of the following nitrogenous bases is NOT found in DNA? Thymine Adenine Uracil Guanine 8. During photosynthesis, energy is converted from ___ energy into ___ energy, stored in the bonds of glucose Chemical; Chemical Light; Chemical Kinetic; Chemical Mechanical; Light 9. The primary product of photolysis in light reactions is _________ ATP Oxygen NADPH Glucose 10. Non-coding RNAs, such as microRNAs (miRNAs), can be considered part of epigenetic regulation because they___________ Code for histone proteins Directly repair DNA damage Are the primary components of chromatin Regulate gene expression at the post-transcriptional level without altering the DNA sequence Loading …
