CBSE Class 10 Science Biology Nutrition Assignment Set B

Question. The raw materials for photosynthesis are
(a) CO₂ & O₂1
(b) sunlight and CO₂
(c) water and chlorophyll
(d) CO₂ and water.

Answer: D

Question. Compensation point refers to the intensity of light at which
(a) Rate of respiration = rate of photosynthesis
(b) Rate of respiration > rate of photosynthesis 
(c) Rate of respiration < Rate of photosynthesis
(d) None of the above is correct

Answer: A

Question. The wave of contractions that pushes the food through the alimentary canal is called
(a) peritoneum 
(b) peristalsis 
(c) cyclosis 
(d) polarisation

Answer: B

Question. In amoeba absorption of the digested nutrients occurs in
(a) contractile vacuole 
(b) plasma membrane 
(c) cytoplasm 
(d) pseudopodia

Answer: A

Question. Which of the following ahs no digestive enzyme ?
(a) Saliva
(b) Bile
(c) Gastric juice
(d) Intestinal juice

Answer: B

Question. Plants are green in colour because
(a) they absorb green light only
(b) they reflect green light
(c) they absorb green light but reflect all other lights
(d) none of the above are correct.

Answer: B

Question. The presence of sugar in onion leaves can be tested with
(a) iodine
(b) copper sulphate solution
(c) lime water
(d) benedict’s solution

Answer: D

Question. Chemical reaction takes place during dark reaction of photosynthesis is
(a) photolysis
(b) hydrolysis
(c) carbon dioxide is bonded with RUBP
(d) nitrogen fixation

Answer: C

Question. Digestion of starch starts from
(a) stomach 
(b) intestine 
(c) esophagus 
(d) mouth

Answer: D 

Question. Teeth involved in cutting of food material are called
(a) canines 
(b) incisors 
(b) molars 
(d) premolars

Answer: B

Question. CO₂ acceptor during dark reaction of photosynthesis is
(a) RUBP
(b) PEP
(c) NADPH
(d) ATP

Answer: A

Question. The nutrition in mucor is
(a) parasitic
(b) autotrophic
(c) saprophytic
(d) holozoic

Answer: C

Question. In amoeba the digestion is intracellular because
(a) amoeba is unicellular
(b) amoeba is multicellular
(c) amoeba is found is pond
(d) amoeba is microscopic animal

Answer: A

Question. Digestion of food in human starts from
(a) duodenum
(b) small intestine
(c) mouth
(d) large intestine

Answer: C

Question. Full name of N ADP is
(a) Nicotinamide dinucleotide phosphate
(b) Nicotine adenine dinuceotide phosphate
(c) Nicotinamide adenine dinucleotide phosphate
(d) None of the above

Answer: C

Question. Dark reaction and light reaction of photosynthesis takes place in
(a) stroma and grana of chloroplast respectively
(b) grana and stroma of chloroplast respectively
(c) grana only
(d) stroma only

Answer: A

Question. Wavelength of visible light is
(a) 200 - 400 nm
(b) 400 - 700 nm
(c) 700 - 900 nm
(d) 100 - 200 nm

Answer: B

Question. The digestion of food is completed in the
(a) ileum
(b) duodenum
(c) stomach
(d) large intestine

Answer: A

Question. The most important function of villi in the small intestine is
(a) to provide strength to the intestine
(b) to provide space for capillaries and lacteals
(c) to provide increased surface area for absorption of digested food
(d) to provide habitat for bacteria

Answer: C

Question. The final product of digestion of carbohydrates and proteins are
(a) glycerol and amino acid respectively
(b) glucose and amino acids respectively
(c) amino acids and glycerol respectively
(d) amino acids and glucose respectively

Answer: B

Question. In amoeba the digestion of food is
(a) extracellular 
(b) intracellular 
(c) intercellular 
(d) none of the options

Answer: B

Question. Coiled and well developed alimentary canal first developed in
(a) Protozoans 
(b) Mammals 
(c) Arthropods 
(d) Poriferans

Answer: C
 

Question. Ptyalin enzyme is secreted by
(a) salivary glands
(b) mouth 
(c) esophagus 
(d) stomach

Answer: A

Question. Which of the following sections does not contain enzymes ?
(a) Bile
(b) Pancreatic juice
(c) Intestinal juice
(d) Saliva

Answer: A

Question. Chewing is an example of
(a) chemical digestion
(b) mechanical digestion
(c) involuntary action
(d) hydrolysis

Answer: B

Question. Villi are present on
(a) stomach 
(b) large intestine 
(c) small intestine 
(d) mouth

Answer: C

Question. Through mastication of food is essential because
(a) mastication of food makes the teeth stronger
(b) it makes the process of swallowing the food easier
(c) by this process bigger pieces of food are broken down into smaller pieces.
(d) bigger pieces of food are broken down into smaller pieces and saliva is properly mixed with it

Answer: D

Question. Most of the photosynthesis (80%) which takes place on this earth is carried out by
(a) green plants on land
(b) algae present in fresh water
(c) algae found in ocean
(d) algae present in ocean and fresh water sources.

Answer: D

Question. Among the following which is a parasitic plant ?
(a) Plasmodium
(b) Cuscuta
(c) Amoeba
(d) Rhizobium

Answer: B