EAMCET Botany Model Questions with Key

1. The following scientist discovered that green plants absorb toxic gases and release pure gas.
1) Koelreuter 2) Stephen Hales 3) Joseph Priestly 4) Robert Hill

2. Assertion (A): Photosynthesis is termed as endergonic reaction.
Reason (R): The products of photosynthesis contain more energy than the reactants.
1) Both (A) and (R) are true and (R) is the correct explanation of (A)
2) Both (A) and (R) are true but (R) is not the correct explanation of (A).
3) (A) is true, but (R) is false.
4) (A) is false, but (R) is true.

3. CO2 in photosynthesis undergoes which of the following reaction
1) Oxidation 2) Reduction 3) Carboxylation 4) Biological Oxidation

4. The molecular formula of Chlorophyll pigment present in all higher plants and chlorophyceae is
1) C55H72O6N4Mg
2) C55H70O5N4Mg
3) C55H70O6N4Mg
4) C55H72O5N4Mg

5. The end product and bye-product of photosynthesis can be shown respectively as follows.
1) Glucose, Oxygen 2) Oxygen, Glucose 3) Glucose, CO2
4) Glucose, Water and Oxygen

6. Assertion (A): Photosynthesis is an anabolic process.
Reason (R): The process involves the storage of energy.
1) Both (A) and (R) are true and (R) is the correct explanation of (A).
2) Both (A) and (R) are true but (R) is not the correct explanation of (A)
3) (A) is true, but (R) is false.
4) (A) is false, but (R) is true.

7. The movement of sugars, in dicot leaf having differentiated mesophyll, occurs as follows. The tissues involved in it are
A = Spongy mesophyll cells,
B = Parenchyma of bundle sheath,
C = Phloem, D = xylem,
E = Palisade mesophyll
1) A→E →B →C →D
2) A→E →B →C
3) B →A→E →C
4) E →A→B →C

8. The cavity inside thylakoid membrane is
1) Stroma 2) Lamella 3) Lumen 4) Vacuole

9. Non appressed regions in the chloroplast are A = The region where one thylakoid is in contact with the other; B = Stroma thylakoids;
C = End membranes of grana; D = Grana margins which are exposed to stroma.
1) D only 2) B, C, D 3) A only 4) C, D

10. The following pigments are Water soluble.
1) Those present in Rhodophyceae
2) Those present fin Xanthophyceae
3) Those pigments present in Phaeophyceae
4) Those present in Bacillariophyceae

11. Arrange the following pigments in ascending order basing on their molecular weight.
A = Xanthophyll, B = Chlorophyll-b,
C = Chlorophyll-a without Mg+2,
D = Carotene, E = Chlorophyll-a
1) A B D E C 2) D C A B E 3) A C D B E 4) D A C E B

12. Study the following lists.
List I List II
(A) Chlorophyll-d I Xanthophyceae
(B) Chlorophyll-b II Brown algae
(C) Chlorophyll-e III Diatoms
(D) Chlorophyll-c IV Green algae V Red algae
The correct match is
A B C D A B C D
(1) V I II III (2) II IV I V (3) V IV I III (4) IV V I II

13. Pigment that is useful in the synthesis of a hormone
1) Carotene 2) Carotenoids
3) Xanthophyll 4) Chlorophyll-a

14. The pigment that is blue green in colour
1) Chlorophyll-a 2) Phycocyanin 3) Phycoerythrin 4) Phycobilins

15. The part of chlorophyll molecule other than alcoholic part is
1) Pyrole 2) 4 Pyrole rings 3) Phytol 4) Porphyrin

16. Carbon ratio in porphyrin and phytol
1) 2:3 2) 1:4 3) 7:4 4) 3:1

17. Pigment without oxygen is
1) Phycobilins 2) Carotene 3) Chlorophyll 4) Xanthophyll

18. The following consists magnesium
1) Chlorophyll 2) Phytol 3) Pyrole rings 4) Porphyrin

19. The position of Magnesium in Chlorophyll
1) Centre of chlorophyll
2) Between 4 Pyrole rings
3) Centre of Pyrole
4) Between phytol & pyrole

20. Chl-a and Chl-b differ in structure. The difference is associated with
1) 3rd carbon of second pyrole ring
2) 2rd carbon of third pyrole ring
3) 2rd carbon of second pyrole ring
4) 3rd carbon of third pyrole ring

KEY
1 - 3 2 - 1 3 - 2 4 - 3 5 - 1 6 - 1 7 - 4 8 - 3 9 - 2 10 - 1 11 - 4 12 - 3 13 - 2 14 - 1 15 - 4 16 - 3 17 - 2 18 - 4 19 - 2 20 - 1

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