Biology Class 11

Mineral Nutrition Objective Questions In plants, a common symptom caused by deficiency of P, K, Ca and Mg is the (a) bending of leaf tip (b) formation of anthocyanins (c) poor development of vasculature (d) appearance of dead necrotic tissue Answer: (d) appearance of dead necrotic tissue Function of zinc is (a) Closing of stomata […]

Transport in Plants Objective Questions Dry seeds kept in water swell due to (a) absorption (b) diffusion (c) imbibition (d) none of these Answer: (c) imbibition Choose the correct statement/statements. Pumps in active transport are A. Lipids that bind molecules to pass them through the membrane. B. Transport molecules uphill. C. These are specific transporters. […]

Cell Cycle and Cell Division Objective Questions Golgi complex and endoplasmic reticulum cannot be seen during (a) late telophase (b) late prophase (c) early anaphase (d) late metaphase Answer: (b) late prophase Cell plate grows from (a) walls to the centre (b) centre to the walls (c) in patches (d) simultaneously Answer: (b) centre to […]

Biomolecules Objective Questions An example of competitive inhibition of an enzyme is the inhibition of (a) succinic dehydrogenase by malonic acid (b) cytochrome oxidase by cyanide (c) hexokinase by glucose-6-phosphate (d) carbonic anhydrase by carbon dioxide Answer: (a) succinic dehydrogenase by malonic acid Insulin is made up of _______ and _______. (a) glucose and fructose […]

Cell : The Unit of Life Objective Questions The cytoplasmic connections from cell to cell are known as (a) middle lamella (b) plasmodesmata (c) cell membrane system (d) endoplasmic reticulum Answer: (b) plasmodesmata Bacterial flagella is made up of (a) tubulin (b) flagellin (c) chitin (d) None of these Answer Answer: (b) flagellin Plasmolysis occurs […]

Structural Organisation in Animals Objective Questions Blood corpuscles are formed in the (a) Haversian canal (b) endosteum (c) red bone marrow (d) pancreas Answer: (c) red bone marrow Which of the following is absent in female frog? (a) Webbed feet (b) Copulatory pads (c) Tympanum (d) All are present Answer: (b) Copulatory pads Osteoblasts are […]

Anatomy of Flowering Plants Objective Questions Pith is very well developed in (a) monocot root and monocot srem (b) monocot root and dicot root (c) dicot root and monocot stem (d) monocot root and dicot stem Answer: (d) monocot root and dicot stem Which of the following helps in the curling of the leaf surface? […]

Morphology of Flowering Plants Objective Questions Thors and spines are (a) homologous organs (b) analogous organs (c) thron is homologous while spine is analogous (d) spine is homologous while is analogous Answer: (d) A In which of the following plants stems do not store the food material (a) potato (b) ginger (c) onion (d) colocasia […]

Animal Kingdom Objective Questions Which one of the following is NOT a characteristic of phylum Annelida? (a) Ventral nerve cord (b) Closed circulatory system (c) Segmentation (d) Pseudocoelom Answer: (d) Pseudocoelom ______ are devoid of respiratory, excretory and circulatory organs. (a) Threadworms (b) Sponges (c) Tapeworms (d) Liver fluke Answer: (b) Sponges Fluke infections are […]

Plant Kingdom Objective Questions Which of the following is used to grow microbes? (a) Laminaria (b) Gelidium (c) Chlorella (d) Sargassum Answer: (b) Gelidium Isogamous condition with non-flagellated gametes is found in (a) Chlamydomonas (b) Spirogyra (c) Volvox (d) Fucus Answer: (b) Spirogyra Gymnosperms produce neither flower nor fruit because they do not possess (a) […]