Q. Synthetic detergents are -
1) Sodium salts of fatty acids
2) A mixture of sodium carbonate and sodium chloride
3) Calcium salts of hydrochloric acid
4) A mixture of sodium salts of aromatic and aliphatic sulphonic acids
Q. A cell is unable to synthesize lipids. Which .of its cell organelles might be defective?
1) Smooth endoplasmic reticulum
2) Golgi bodies
3) Lysosomes
4) Mitochondria
Q. Which one of the following plants has unisexual flowers?
1) Papaya
2) Hibiscus
3) Mustard
4) Sunflower
Q. Which one of the following is the mechanism of action of oral contraceptive pills?
1) They kill the egg
2) They kill the sperm
3) They kill the zygote
4) They inhibit the release of an egg
Q. Which one of the following is caused by a bacterial pathogen?
1) AIDS
2) Dengue fever
3) COVID-19
4) Typhoid fever
Q. Which one of the following groups are called amphibians of plant kingdom?
1) Bryophytes
2) Thallophytes
3) Pteridophytes
4) Gymnosperms
Q. Which one of the following belongs to Pisces?
1) Dogfish
2) Jellyfish
3) Silverfish
4) Starfish
Q. In aquatic plants, large air sacs give them buoyancy effects. These sacs are surrounded by which one of the following types of tissues?
1) Parenchyma
2) Collenchyma
3) Sclerenchyma
4) Complex tissue
Q. Which one of the following statements about 'vacuoles' is not correct?
1) In plants, there is a large central vacuole that may occupy 90% of total cell volume
2) In plant cells, vacuoles provide turgidity and rigidity
3) In Amoeba, vacuoles have a role in nutrition
4) Vacuoles are absent in animal cells
Q. Which one of the following plant plastids stores starch, oil, and protein granules?
1) Chloroplast
2) Leucoplast
3) Chromoplast
4) Xanthoplast
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