1. Most of the plants obtain nitrogen from the soil in the form of
- (A) Free nitrogen gas
- (B) Nitric acid
- (C) Nitrites
- (D) Nitrates
2. Carbon becomes available to crop plants in the form of
- (A) Amino acids
- (B) Carbonates
- (C) Carbon dioxide
- (D) Element carbon
3. Growth curve is always
- (A) Curved
- (B) Straight line
- (C) Sigmoid
- (D) Both (A) and (B)
4. Full form of 2-4D is–
- (A) 2-4 Dichloronephthalic acid
- (B) 2-4 Dichlorophenoxy acetic acid
- (C) 2-4 Dichlorobutyric acid
- (D) 2-4 Dichloroacetic acid
5. Chlorophyll contain–
- (A) Mg
- (B) Fe
- (C) K
- (D) Mn
6. The chief element among the following required by a plant for making its proteins-
- (A) Iron
- (B) Calcium
- (C) Magnesium
- (D) Nitrogen
7. which of the following plants cannot fix atmospheric nitrogen directly
- (A) Pea
- (B) Bean
- (C) Horse grams
- (D) Castor
8. A bulk of nitrogen in nature is fixed by-
- (A) Lightening
- (B) Denitrifying bacteria
- (C) Symbiotic bacteria
- (D) Chemical industries
9. Proteins are made up of
- (A) Sugars
- (B) Fatty acids
- (C) Amino acids
- (D Nucleic acid
10. The correct sequence of growth is-
- (A) Cell division-cell elongation-cell differentiation
- (B) Cell division-differentiation-elongation
- (C) Division differentiation
- (D) Elongation-division-differentiation
11. Regulation of plant growth is due to
- (A) Growth hormones
- (B) Environment
- (C) Genetics of plants
- (D) Environment and growth hormones
12. Main function of Xylem is
- (A) Mechanical support
- (B) Conduction of water
- (C) Protection
- (D) Both (A) and (B)
13. Raw material for photosynthesis is-
- (A) Water
- (B) CO
- (C) Both (A) & (B)
- (D) SO2
14. Light reaction of photosynthesis occurs in-
- (A) Grana
- (B) Stomata
- (C) Chloroplast membrane
- (D) Cytoplasm
15. The dark reaction in photosynthesis so called because it
- (A) Needs darkness
- (B) Cannot occur in light
- (C) is accelerated at night
- (D) Does not require light energy
16. Energy rich compound produced in respiration is-
- (B) ADP
- (A) ATP
- (C) AMP
- (D) ACP
17. In presence of light, green plants convert carbon dioxide and water into food stuffs. Which of the following is likely to be the first substance that a green plant makes in photosynthesis
- (A) A simple sugar
- (B) Starch
- (C) Cellulose
- (D) Fats
18. Leaves appear green because they–
- (A) Absorb green lights
- (B) Reflect green light
- (C) Both absorb and reflect green light
- (D) None of these
19. The first step in photosynthesis is the-
- (A) Joining of 3-carbon atoms to form glucose
- (B) Formation of ATP
- (C) Ionization of water
- (D) Excitement of an electron of chlorophyll by a photon of light
20. oxygen which is liberated during photo-synthesis comes from–
- (A) Carbon dioxide
- (B) Water
- (C) Phosphoglyceric acid
- (D) Chlorophyll
You might also like :
Micro Biology of Urinary tract infections
Medical Microbiology – Microbial Diseases
What is Important Role of Biological Science in Human Welfare?
Bioinformatics and its Scope
Bioinformatics and Computational Biology – Bio Computing – Computational Biology
Drug Discovery and Protein – Protein Interactions
Leave a Comment