1. Which is responsible for the growth in circumference of a stem or root
- (A) Xylem
- (B) Phloem
- (C) Cortex
- (D) Cambium
2. CO2 is formed in all the following except
- (A) Respiration in plants
- (B) The burning of sugar
- (C) On heating of lime stone
- (D) Photosynthesis by plants
3. Which wavelength of light carry out photo-synthesis in bacteria
- (A) Ultra violet
- (B) Blue
- (C) Red
- (D) Near infra red
4. In Kreb’s cycle-
- (A) Pyruvic acid is converted into CO2 and water
- (B) ADP is converted into ATP
- (C) Glucose is converted into CO2 (D) Pyruvic acid is converted into ATP
5. Importance of Kreb’s cycle is–
- (A) Production of amino acids
- (B) Production of vitamins
- (C) Production of ATP molecules through oxidative phosphoxylation
- (D) To encourage glycolysis
6. ATP is (stands for)-
- (A) An enzyme which brings about oxidation
- (B) A hormone
- (C) A protein
- (D) A molecule which contain high phosphate bonds (adenosine triphosphate)
7. Net gain of ATP in glycolysis-
- (A) 6
- (B) 2
- (C) 4
- (D) 8
8. The net gain of energy from one gram mole of glucose during aerobic respiration is-
- (A) 2 ATP
- (B) 4 ATP
- (C) 38 ATP
- (D) 40 ATP
9. Kreb’s cycle starts with the formation of a six carbon compound by reaction between–
- (A) Malic acid and acetyl coenzyme A
- (B) Succinic acid and pyruvic acid
- (C) Fumaric acid and pyruvic acid
- (D) Oxaloacetic acid and acetyl coenzyme A
10. Auxanometer is meant for-
- (A) Respiratory activity
- (B) Photosynthetic activity
- (C) Growth activity
- (D) Osmotic pressure
11. Mendel choose pea plants because-
- (A) They were cheap
- (B) They were having contrasting characters
- (C) They were easily available
- (D) of great economic importance
12. sour taste of vinegar is due to
- (A) Citric acid
- (B) Tartaric acid
- (C) Acetic acid
- (D) Lactic acid
13. Richest source of carbohydrates is
- (A) Wheat
- (B) Maize
- (C) Rice
- (D) Barley
14. Water soluble vitamin is-
- (A) Vitamin C
- (B) Vitamin A
- (D) Vitamin K
- (C) Vitamin D
15. A vitamin is generally-
- (A) Enzyme
- (B) A complex of different enzymes
- (C) Coenzyme
- (D) A complex of different coenzyme
16. From which part of turmeric plant, the turmeric powder is obtained
- (A) Dried rhizome
- (B) Seed
- (C) Dried foot
- (D) Dried root
17. Jute fibres are obtained from
- (A) Bark (Phloem)
- (B) Pith
- (C) Xylem
- (D) Endodermis
18. The leguminous plants are important in agriculture-
- (A) Because they need very little water to
- (B) grow resistant They are disease
- (C) Help in nitrogen economy of nature
- (D) Because six crops are harvested in a year
19. Xylem conducts water from the
- (A) Leaves to roots
- (B) Roots to leaves
- (C) Tracheids to vessels
- (D) Fibres to tracheids
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