Question 12. What are the products obtained by anaerobic respiration in plants?
(a) Lactic acid + Energy
(b) Carbon dioxide + Water + Energy
(c) Ethanol + Carbon dioxide + Energy
(d) Pyruvate
Answer
Question 13. The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d) nucleus
Answer
Question 14. Glycolysis process occurs in which part of the cell?
(a) Cytoplasm
(b) Nucleus
(c) Mitochondria
(d) Chloroplast
Answer
Question 15. Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps?
(a) Ethanol + Carbon dioxide + Energy
(b) Lactic acid + Energy
(c) Carbon dioxide + Water + Energy
(d) Pyruvate
Answer
Question 16. Name the pores in a leaf through which respi-ratory exchange of gases takes place.
(a) Lenticels
(b) Vacuoles
(c) Xylem
(d) Stomata
Answer
Question l7. The respiratory pigment in human beings is:
(a) carotene
(b) chlorophyll
(c) haemoglobin
(d) mitochondria
Answer
Question 18. Which plant tissue transports water and min-erals from the roots to the leaf?
(a) Xylem
(b) Phloem
(c) Parenchyma
(d) Collenchyma
Answer
Question 19. The movement of food in phloem is called:
(a) transpiration
(b) translocation
(c) respiration
(d) evaporation
Answer
Question 20. A blood vessel which pumps the blood from the heart to the entire body:
(a) artery
(b) capillary
(c) Vein
(d) Haemoglobin
Answer
Question 21. Name a circulatory fluid in the human body other than blood.
(a) Platelets
(b) RBC
(c) Lymph
(d) Plasma
Answer
Question 22. Single circulation, i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by which of the following:
(a) hyla, rana, draco
(b) whale, dolphin, turtle
(c) labeo, chameleon, salamander
(d) hippocampus, exocoetus, anabas
Answer
Question 23. Name the tube which connects the kidneys to the urinary bladder.
(a) Urethra
(b) Nephron
(c) Tubule
(d) Ureter
Answer
Question 24. Which part of nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?
(a) Tubule
(b) Glomerulus
(c) Bowman’s capsule
(d) Ureter
Answer
Question 25. Where is the dirty blood in our body filtered?
(a) Heart
(b) Lungs
(c) Ureter
(d) Kidneys
Answer
Question 26. The procedure used for cleaning the blood of a person by separating urea from it is called:
(a) osmosis
(b) filtration
(c) dialysis
(d) double circulation
Answer
Question 27. Which is the correct sequence of body parts in the human alimentary canal?
(a) Mouth → stomach → small intestine → large intestine → oesophagus
(b) Mouth → oesophagus → stomach → small intestine → large intestine
(c) Mouth → stomach → oesophagus → smallintestine → large intestine
(d) Mouth → oesophagus → stomach → large intestine → small intestine
Answer
Question 28. Identify the correct pat of urine in the human body.
(a) Kidney → urinary bladder → urethra → ureter
(b) Urinary bladder → ureter → kidney → urethra
(c) Kidney → ureter → urethra → urinary bladder
(d) Kidney → ureter → urinary bladder → urethra
Answers
12. What are the products obtained by anaerobic respiration in plants?
(c) Ethanol + Carbon dioxide + Energy
Like in yeast
13. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(b) mitochondria
it is the powerhouse of the cell
14. Glycolysis process occurs in which part of the cell?
(a) Cytoplasm
is anaerobic, do not provide energy
15. Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps?
(b) Lactic acid + Energy
waste product when not complete oxygen is available
16. Name the pores in a leaf through which the respiratory exchange of gases takes place.
(d) Stomata
the small apertures guarded by guard cells
l7. The respiratory pigment in human beings is:
(c) haemoglobin
the red colour is due to iron
18. Which plant tissue transports water and minerals from the roots to the leaf?
(a) Xylem
unidirectional vascular system
19. The movement of food in phloem is called:
(b) translocation
multidirectional vascular system
20. A blood vessel that pumps the blood from the heart to the entire body:
(a) artery
they carry oxygenated blood
21. Name a circulatory fluid in the human body other than blood
(c) Lymph
contains proteins and fats
22. Single circulation, i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by which of the following:
(d) hippocampus, exocoetus, anabas
this was very less efficient
23. Name the tube which connects the kidneys to the urinary bladder.
(d) Ureter
24. Which part of the nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?
(a) Tubule
precisely the PCT
25. Where is the dirty blood in our body filtered?
(d) Kidneys
through the help of nephrons
26. The procedure used for cleaning the blood of a person by separating urea from it is called:
(c) dialysis
artificial method
27. Which is the correct sequence of body parts in the human alimentary canal?
(b) Mouth → oesophagus → stomach → small intestine → large intestine
28. Identify the correct path of urine in the human body.
(d) Kidney → ureter → urinary bladder → urethra