Biology Objective Questions and Answers – Biology Quiz

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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