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Body Fluids and Circulation Objective Questions In developing embryo RBCs are formed in (a) Lymph node (b) Bone marrow (c) Liver (d) Spleen Answer: (c) Liver In humans, blood passes from the post caval to the diastolic right atrium of heart due to: (a) Pressure difference between the post caval and atrium (b) Pushing open […]

Breathing and Exchange of Gases Objective Questions The function of pneumotaxic centre is (a) regulate inspiration (b) regulate rhythm (c) increase heart rate (d) all of the above Answer: (a) regulate inspiration Which one of the following is NOT correct? (a) The nasal cavity warms and humidifies the air before it enters the lungs (b) […]

Digestion and Absorption Objective Questions Which part of brain causes nausea? (a) Pons (b) Hypothalamus (c) Parietal lobe (d) Medulla Answer: (d) Medulla Correct enzyme-substrate pair is (a) Maltose-lactase (b) Protein-amylase (c) Carbohydrate-lipase (d) Casein-rennin Answer: (d) Casein-rennin Peyers patches found in the small intestine are (a) Epithelial tissue (b) Glandular tissue (c) Lymphatic tissue […]

Plant Growth and Development Objective Questions Mechanism of development was explained by (a) Hans Dietrisch (b) Spemann (c) Both a and b (d) Haemmerling Answer: (c) Both a and b Intercalary meristems are of (a) Permanent nature (b) Temporary nature (c) Some are permanent some temporary (d) None of these Answer: (b) Temporary nature Cells […]

Respiration in Plants Objective Questions Angiosperm pollen is generally released at the (a) 1 – celled stage (b) 2 – celled stage (c) 3 – celled stage (d) male gamete formation stage Answer: (b) 2 – celled stage The complete oxidation of pyruvate take place in (a) cell cytoplasm (b) inner mitochondrial membrane (c) mitochondrial […]

Photosynthesis in Higher Plants Objective Questions The rate of photosynthesis is controlled by (a) the rate of light reaction (b) the rate of dark reaction (c) the rates of both light and dark reactions (d) none of the above Answer: (b) the rate of dark reaction The end product of the Calvin cycle is ______. […]

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 […]