MCQs Plant Breeding and Genetics-48 Posted on 2025-11-16Author admin 0 1. Which of the following crop–modified organ pairs is incorrect? Sweet potato – Stem tuber Radish – Tap root Carrot – Tap root Potato – Stem tuber 2. Lignin is a key component of ____________ The Golgi apparatus The plasmodesmata Secondary cell walls Primary cell walls only 3. Which of the following is an acellular organism that completely lacks a nucleus and other organelles? Tobacco Mosaic Virus Saccharomyces cerevisiae (a yeast fungus) Escherichia coli (a bacterium) Chlamydomonas (a green alga) 4. Which pigment is primarily responsible for perceiving red and far-red light in plants? Cryptochrome Phytochrome Phototropin Carotenoid 5. A hybrid from a cross between two single crosses is known as __________ Double cross Dihybrid Multiple hybrid Three-way cross 6. The fruit of the castor plant is a ________ Caryopsis Siliqua Pod Capsule 7. The discovery of the first chemical mutagen, mustard gas, was made by __________. Thomas Hunt Morgan Joshua Lederberg Charlotte Auerbach and J.M. Robson Herman Muller 8. The metabolism of carbohydrates and lipids involves____________ Both anabolic and catabolic pathways Only anabolic pathways None of these Only catabolic pathways 9. Which of the following is a stem modification for vegetative propagation? Potato – Tuber Carrot – Tap root Beet – Tap root Sweet potato – Root tuber 10. The main role of cellulose in plants is to _________ Facilitate photosynthesis Regulate water transport Store energy Provide structural support Loading …
