During meiosis I, the chromosomes start pairing at
Options
(a) Leptotene (b) Zygotene (c) Pachytene (d) Diplotene
Correct Answer:
Zygotene
Explanation:
During zygotene, a substage of Prophase I of meiosis I, chromosomes start pairing […]
Cellulose is the major component of cell walls of
Options
(a) Pythium (b) Xanthomonas (c) Pseudomonas (d) Saccharomyces
Correct Answer:
Pythium
Explanation:
Cellulose is a major component of cell wall of Pythium. Pythium is […]
A competitive inhibitor of succinic dehydrogenase is
Options
(a) Malonate (b) Oxaloacetate (c) m-ketoglutarate (d) Malate
Correct Answer:
Malonate
Explanation:
Malonate is a powerful inhibitor of cellular respiration, because it binds to the active […]
During mitosis ER and nucleolus begin to disappear at:
Options
(a) late prophase (b) early metaphase (c) late metaphase (d) early prophase
Correct Answer:
early prophase
Explanation:
During mitosis. endoplasmic reticulum and nucleus begins […]
The essential chemical components of many coenzymes are:
Options
(a) Nucleic acids (b) Carbohydrates (c) Vitamins (d) Proteins
Correct Answer:
Vitamins
Explanation:
The essential chemical components of many enzymes are vitamins, e.g., coenzyme nicotinamide […]
Which one is the most abundant protein in the animal world
Options
(a) Trypsin (b) Haemoglobin (c) Collagen (d) Insulin
Correct Answer:
Collagen
Explanation:
Collagen is the most abundant protein of animal world. Rubisco […]
The main arena of various types of activities of a cell is:
Options
(a) plasma membrane (b) mitochondrian (c) cytoplasm (d) nucleus
Correct Answer:
cytoplasm
Explanation:
The main arena of various types of activities […]
Which one of the following structure between two adjacent cells is an effective transport pathway?
Options
(a) Plasmodesmata (b) Plastoquinones (c) Endoplasmic reticulum (d) Plasmalemma
Correct Answer:
Plasmodesmata
Explanation:
Plasmodesmata are the structure […]
Which one of the following is not a constituent of cell membrane?
Options
(a) glycolipids (b) proline (c) phospholipids (d) cholesterol
Correct Answer:
proline
Explanation:
Proline is an amino acid and not a part […]
Important site for formation of glycoproteins and glycolipids is
Options
(a) vacuole (b) golgi apparatus (c) plastid (d) Iysosome
Correct Answer:
golgi apparatus
Explanation:
Eukaryotic cells contain a unique cluster of membrane vesicles known […]
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