In which one of the following types of connective tissues in animals does fat get stored?
- A.Adipocyte
- B.Chondrocyte
- C.Osteocyte
- D.Reticulocyte
Correct answer
Explanation
The correct answer is A, Adipocyte. Adipocytes are the fat cells of adipose tissue, a loose connective tissue that stores fat in animals.
Adipose tissue lies mainly beneath the skin and around organs such as the kidneys and heart. Each adipocyte holds a large droplet of fat that pushes its nucleus to one side. This stored fat is a reserve of energy, works as an insulator that keeps the body warm, and cushions organs against shocks. Animals of cold regions, such as whales and seals, have a thick layer of it called blubber.
B is wrong because chondrocytes are the cells of cartilage, the flexible tissue found in the nose, ear and the ends of bones. C is wrong because osteocytes are mature bone cells sitting in a hard matrix of calcium and phosphorus. D is wrong because reticulocytes are immature red blood cells, not fat-storing cells.
Exam tip: adipocyte means fat cell, chondrocyte cartilage cell, osteocyte bone cell and reticulocyte young red blood cell.
Practice Questions
View allIn plant cells, RNA is present in
- A.cytoplasm only
- B.nuclei and cytoplasm only
- C.nuclei, cytoplasm, mitochondria, chloroplast and endoplasmic reticulum
- D.nuclei, cytoplasm, mitochondria, chloroplast and ribosomes
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In plant cells RNA is found in the nucleus, the cytoplasm, mitochondria, chloroplasts and ribosomes. RNA is made in the nucleus, where DNA is copied into messenger, transfer and ribosomal RNA; the nucleolus in particular is rich in ribosomal RNA.
Read the full explanation →Cell wall is absent in which one of the following organisms ?
- A.Bacteria
- B.Diatom
- C.Mushroom
- D.Tapeworm
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The tapeworm is an animal, and animal cells have no cell wall, only a cell membrane. A rigid cell wall lies outside the cell membrane in plants, fungi, most bacteria and many protists, giving the cell shape and protection.
Read the full explanation →Methanol is toxic because
- A.methanol coagulates the protoplasm
- B.methanol gets oxidised to methanal in liver which coagulates the protoplasm
- C.methanol gets oxidised to acetic acid in liver which coagulates the protoplasm
- D.methanol gets oxidised to CO in liver which coagulates the protoplasm
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In the liver, methanol is oxidised to methanal (formaldehyde), which coagulates protoplasm and damages cells. Methanol, CH3OH, is the simplest alcohol and is sometimes mixed into illicit liquor.
Read the full explanation →Which one of the following agents does not contribute to propagation of plants through seed dispersal?
- A.Wind
- B.Fungus
- C.Animal
- D.Water
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Seeds are carried away from the parent plant by wind, water and animals, but fungi play no part in seed dispersal.
Read the full explanation →Which one of the following is essential for thyroid gland to make thyroxin?
- A.NaCl
- B.KCl
- C.Cholesterol
- D.Iodine
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Thyroxine is an iodine-containing hormone, so the thyroid gland cannot make it without iodine from the diet. The thyroid is a butterfly-shaped gland in the neck.
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