Biology Class 11

Chemical Coordination and Integration Objective Questions Endemic goitre is a state of (a) Increased thyroid function (b) Normal thyroid function (c) Decreased thyroid function (d) Moderate thyroid function Answer: (c) Decreased thyroid function PTH is called as hypercalcemic hormone because it leads to the (a) absorption of CaCO3 from the digested food (b) reabsorption of water […]

Neural Control and Coordination Objective Questions Which neuroglia cells produce a fatty insulating material called myelin? (a) Satellite cells (b) Schwann cells (c) Both (A) and (B) (d) Neither (A) nor (B) Answer: (b) Schwann cells Which layer is in contact with brain tissues? (a) Piamater (b) Arachnoid (c) Duramater (d) Piamater and Arachnoid Answer: […]

Locomotion and Movement Objective Questions Metacarpals are present in (a) wrist (b) palm (c) digits (d) thigh Answer: (b) palm The elements associated with muscle contraction are (a) Mg and Ca (b) Mg and Cl (c) Na and Ca (d) Ca and K Answer: (c) Na and Ca What happens in osteoporosis? (a) Decrease in […]

Excretory Products and their Elimination Objective Questions Presence of RBCs in urine is (a) Uremia (b) ketonuria (c) Glucosuria (d) hematuria Answer: (d) hematuria Ornithine cycle leads to the formation of (a) NH3 (b) ((NH2)2)CO) (c) C5H4N4O3 (d) C5H4N4 Answer: (b) ((NH2)2)CO) The yellow pigment derived from heme breakdown and excreted by kidneys is (a) […]

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 ______. […]