Biology Chapter 2 Entry test MCQs
Topic 2
Introduction to Bioenergetics and Photosynthesis
1. The most abundant protein in chloroplast is:
a. Ribulose bisphosphate
b. Rubisco
c. Ribulose bisphosphate hydrogenase
d. RUBP
2. The products of photosynthesis in green plants are:
a. C6H12O6 +6O2+H2O+energy
b. C6H12O6 +6O2
c. C6H12O6 +6O2+6H2O
d. (CH2O)n+H2O+2S
3. Incorrect statement for photosynthesis is:
a. It requires chlorophyll
b. It occurs during daytime
c. It uses oxygen
d. It uses water with CO2
Role of Light, H2O and CO2
4. Spectrophotometer is used to measure:
a. Reflection of pigments
b. Absorption of CO2
c. Absorption of different wavelengths
d. Absorption of O2
5. Which shows the effectiveness of wavelengths of light driving photosynthesis?
a. Broad spectrum
b. Absorption spectrum
c. Narrow spectrum
d. Action spectrum
6. Conversion of light energy into chemical energy is function of:
a. Stroma of chloroplast
b. Mitochondria
c. Grana
d. Cytoplasm
7. The source of oxygen released during photosynthesis is:
a. Glucose
b. Water
c. Oxidation of chlorophyll
d. CO₂
8. Van Neil hypothesis about the production of oxygen during photosynthesis was based on the study and investigations on:
a. Protonema
b. Bacteria
c. Cyanobacteria
d. Algae
9. Wavelength of blue light that is absorbed maximum by pigments:
a. 430 nm
b. 670.nm
c. 750 nm
d. 540 nm
10. Which of the following groups does not use water as proton donor?
a. Plants
b. Cyanobacteria
c. Algae
d. Purple sulphur bacteria
11. Air contains………….percentage of carbon dioxide.
a. 0.06-0.08
b. 0.04-0.05
c. 0.03-0.04
d. 0.01-0.02
12. Carotenoids absorb strongly:
a. Yellow red
b. Red to orange
c. Blue violet
d. Yellow green
13. Magnesium is central part of:
a. Pyrrole ring
b. Porphyrin ring
c. Hydrophobic part
d. Phytol tail
14. Chlorophyll consists of:
a. A head of four pyrrole rings and tail of linked nitrogen
b. A head of phytol and tail of four pyrrole rings
c. A head of four pyrrole rings and a phytol tail
d. A head of linked carbons and tail of four pyrrole rings
15. Following is correct sequence of energy transfer between photosynthetic pigments:
a. Chl.b-Carotenoids →Chl.a
b. Chl.a-Chl.b-Carotenoids
c. In any direction
d. Carotenoids-Chl.b→Chl.a
16. All of the followings are differences between Chl. ‘a’ and ‘b’ except:
a. Chla is necessary pigment but Chl.b is accessory pigments
b. Chl.a has different types while Chl.b has single type
c. Chl.a is present in antenna complex while Chl.b is in reaction center
d. Chl.a have functional group-CH3 but Chl.b has-CHO
17. Location of phytol tail of chlorophyll b is:
a. Thylakoid surface
b. Stroma
c. Thylakoid lumen
d. Thylakoid membrane
18. Which one of the following is not function of carotenoids?
a. Transfer energy
b. Convert light energy into chemical energy
c. Protect human eye
d. Protect Chlorophyll
19. Location of photosynthetic pigments in purple sulphur bacteria:
a. Stroma
b. Thylakoids
c. Cytoplasm
d. Grana
Mechanism of Photosynthesis and Photosystems
20. PS-1 is named as it:
a. Absorbs wavelength of 700 n
b. Absorbs wavelength of 680 um
c. Slightly located upward than PS-II
d. Discovered earlier than PS-II
21. Photosystem II has reaction center of:
a. P730
b. P680
c. P660
d. P700
22. During cyclic photophosphorylation, electrons pass from all except:
a. Photosystem II
b. Photosystem I
c. Cytochrome complex
d. Ferredoxin
23. Some photosynthetic organisms contain chloroplasts that lack photosystem II, yet are able to survive. The best way to detect the “lack of photosystem II” in these organisms would be:
a. To test for CO2, fixation in the dark
b. To determine if they have thylakoids in the chloroplasts
c. To do experiments to generate an action spectrum
d. To test for liberation of O2 in the light
Light Reactions (Non-Cyclic and Cyclic Photophosphorylation)
24. Where do the light reactions take place?
a. Chloroplast
b. Stroma
c. Leucoplast
d. Thylakoid membrane
25. The final acceptor of electrons during the noncyclic electron pathway is:
a. ATP
b. Photosystem I
c. NADP+
d. Photosystem II