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