Tag: photosynthesis

Questions Related to photosynthesis

Electron Transport System (ETS) is located in mitochondrial
botany photosynthesis electron transport system modern concept of photosynthesis photosynthesis in higher plants

  1. Outer membrane

  2. Inter membrane space

  3. Inner membrane

  4. Matrix

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Correct Option: C
Explanation:

An electron transport system (ETS) or electron transport chain (ETC) is a series of coenzymes and cytochromes that take part in the passage of electrons from one carrier to another and to its ultimate acceptor. The various components of ETS are arranged in five kinds of complexes, arranged in a definite sequence in the inner mitochondrial membrane.

So the correct option is C.

Cyclic photophosphorylation takes place in the thylakoid which lacks:

botany photosynthesis electron transport system modern concept of photosynthesis photosynthesis in higher plants

  1. Electron transport system

  2. Enzyme FNR(ferredoxin NADP reductase )

  3. Lumen

  4. Photosystem with absorption peak $700nm$

Show answer
Correct Option: A
Explanation:

Cyclic Photophosphorylation is the process, in which systems (like prokaryotes), just accomplishes the ADP to ATP for immediate energy for the cells. This type of photophosphorylation usually occurs in the thylakoid membrane. So the correct option is ' Electron transport system'.

Consider the following events in the photochemical conversion of light energy into chemical energy by chlorophyll during photosynthesis.
a. Charge separation
b. Absorption of a quantum of energy
c. Ejection of electron
d. Transfer of light energy
The correct sequence of these events is?

botany photosynthesis electron transport system modern concept of photosynthesis photosynthesis in higher plants

  1. $4, 2, 1, 3$

  2. $4, 2, 3, 1$

  3. $2, 4, 1, 3$

  4. $2, 4, 3, 1$

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Correct Option: A
Which range of wavelength (in nm) is called photosynthetically active radiation (PAR)? 
botany photosynthesis electron transport system modern concept of photosynthesis photosynthesis in higher plants

  1. 100-390

  2. 390-430

  3. 400-700

  4. 760-10,000

Show answer
Correct Option: C
Explanation:

Sunlight or solar radiations reaching the earth have wavelength between 300 nm (in the ultra volt rang) to 2600 nm (in the infa-red range). Part of the spectrum used in photosynthesis has a wavelength between 400-700 nm, it is called as photo synthetically active radiation (PAR). 

Water soluble vitamins are

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. C and D

  2. A and C

  3. B and C

  4. A and D

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Correct Option: C

Carotenoids are _____________.

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. Glycoproteins

  2. Hydrocarbons

  3. Polysaccharids

  4. Lipoproteins

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Correct Option: A
Accessory photosynthetic pigments in most green plants are 
botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. Chlorophyll $a$

  2. Chlorophyll $b$

  3. Carotenoids and xanthophylls

  4. Both (b) and (c)

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Correct Option: D
Explanation:
Chlorophyll a is found in almost all photosynthetic plants except bacteria it is called primary photosynthetic pigment because it performs primary reactions of photosynthesis which involve the conversion of light energy into chemical energy. other photosynthetic pigments like chlorophyll b, xanthophylls and carotenes are called accessory pigments. They absorb light energy of different wavelengths, broaden the spectrum of light absorption and hand over the energy to chlorophyll aq through electron spin resonance and also protect chlorophyll a from photo-oxidation.
So the correct option is 'both (b) and (c)'.

Which of the following are water soluble pigments? 
A. Chlorophyll A
B. Chlorophyll B
C. Carotenids
D. Phycobilins 

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. A and B (2)

  2. C and D

  3. Only D

  4. Only C

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Correct Option: A

The chlorophyll pigment found in green sulphur bacteria is

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. Bacteriochlorophyll

  2. Bacterioviridin

  3. Phycocyanin

  4. Phycoerythrin

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Correct Option: A

The photosynthetic pigment found in red algae is 

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. Phycocyanin

  2. Carotene

  3. Phycoerythrin

  4. both (a) and (b)

Show answer
Correct Option: A