Question

BIOLOGY - LIFE PROCESSES

1. Where are the proteins first digested in the alimentary canal?
(a) Small intestine
(b) Mouth
(c) Stomach
(d) Oesophagus
2. Which of the following statements about autotrophic nutrition is incorrect?
(a) they synthesize carbohydrates from carbondioxide and water in the presence of sunlight and chlorophyll
(b) they store carbohydrates in the form of starch
(c) they convert carbondioxide and water into carbohydrates in the absence of sunlight
(d) they constitute the first trophic level in first chain
3. The internal energy reserve in heterotrophs is
(a) Proteins
(b) Starch
(c) Glycogen
(d) Fatty acids
4. If salivary amylase is lacking in the saliva, which of the following events is the mouth cavity will be affected?
(a) Proteins breaking down into amino acids
(b) Starch breaking down into sugars
(c) Fats breaking down into fatty acids and glycerol
(d) Absorption of vitamins
5. Which of the following statements are correct?
(a) Pyruvate can be converted into ethanol and carbondioxide by yeast
(b) Fermentation takes place in case of aerobic respiration
(c) Fermentation takes place in mitochondria
(d) Fermentation is a form of anaerobic respiration
6. The blood leaving the tissues becomes richer in
(a) Carbondioxide
(b) Water
(c) Haemoglobin
(d) Oxygen
7. In which of the following vertebrate groups, heart does not pump oxygenated blood to different parts of the body?
(a) Pisces and amphibians
(b) Amphibians and reptiles
(c) Amphibians only
(d) Pisces only


8. Name the blood vessel which carries impure blood from heart to lungs.
(a) Pulmonary vein
(b) Pulmonary artery
(c) Aorta
(d) Inferior vena cava
9. The substance which is not reabsorbed into the blood capillaries surrounding the tubule of a nephron is
(a) Glucose
(b) Amino acid
(c) Urea
(d) Water
10. The break down of pyruvate to give carbondioxide and energy takes place in
(a) Cytoplasm
(b) Mitochondria
(c) Chloroplasts
(d) Nucleus
11. Name the areas in a woody stem through which respiratory exchange of gases takes place.
12. Oxygen is a by-product of photosynthesis. Name the substance from which oxygen is released.
13. State the role of pancreatic lipase.
14. What is the energy currency of the cell , which helps to carry out various cellular activities?
15. What is common for Cuscuta and leeches?
16. Give the other term for extra cellular fluid or tissue fluid.
17. Name the largest artery in our body.
18. Where does ultra filtration take place in the nephron?
19. In which part is the food digested in Amoeba?
20. Name the blood cells that helps in clotting of blood.
21. State the function of bile.
22. Write the equations for the following processes:
(a) Photosynthesis (b)Anaerobic respiration in yeast
(c ) Anaerobic respiration in muscle cells
23. Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
24. Write any one difference between transpiration and translocation.
25. What are the substances found in the initial filtrate/glomerular filtrate?
26. Distinguish between blood and lymph.
27. How is oxygen and carbondioxide transported in human beings.
28. Why herbivores have longer small intestine than carnivores.
29. What is the function of hydrochloric acid produced by the gastric glands in the stomach?
30. Aquatic animals breathe faster than terrestrial organisms. Give reason.
31. Rings of cartilage are present in trachea. Why?

Answer 1

1. Oesophagus.
2. ( D )
3. Fatty acids.
4. (A)