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

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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

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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

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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

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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

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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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