Tag: photosynthesis

Questions Related to photosynthesis

How many chlorophyll molecules are found in a quantasome?

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. $295$

  2. $500$

  3. $230$

  4. $100$

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Correct Option: A

The empirical formula for chlorophyll 'a' is ___________________.

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. $C _{35}H _{72}O _{5}N _{4}Mg$

  2. $C _{35}H _{70}O _{6}N _{4}Mg$

  3. $C _{55}H _{72}O _{5}N _{4}Mg$

  4. $C _{54}H _{70}O _{6}N _{4}Mg$

Show answer
Correct Option: C
Explanation:

Chlorophyll a is bluish-green with empirical formula of C55H72O5N4Mg

So the correct option is C.

Reserve food material in plants is in form is _______.

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. Cellulose

  2. Starch

  3. Pectin

  4. Sucrose

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Correct Option: B
Explanation:

Plants is the kingdom of organisms that possess chlorophyll. They synthesis their food by the process called photosynthesis. Starch is synthesized during the process of photosynthesis and stored as reserved food material.

Bacteriochlorophyll differs from chlorophyll 'a' in having

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. One pyrole ring with one hydrogen

  2. One pyrole ring with two hydrogen

  3. One pyrole ring with three hydrogen

  4. One pyrole ring with four hydrogen

Show answer
Correct Option: B
Explanation:

Purple sulphur bacteria and non-sulphur bacteria contain bacteria-chlorophyll,which is having 2H-atoms more than chl.a and it absorb 850-950 nm(infra-red) wavelength of light.

In which one of the following sets of plants is the endosperm chlorophyll us?

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. Rosa, Prunus

  2. Crinum, Raphanus

  3. Arachis, Cicer

  4. Linum, Olea

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Correct Option: A

Which of these is a type of phycobilin pigments?

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. Phycocyanin

  2. Allophycocyanin

  3. Phycoerythrin

  4. All of the above

Show answer
Correct Option: D
Explanation:

Phycobilins are open tetrapyrroles which neither contain magnesium nor phytol. Phycobilins are water soluble. The pigments are of two types-blue (phycocyanin, allophycocyanin) and red (phycoerythrin). The pigments are useful in chromatic adaptations. They are important accessory pigments of blue-green algae, cryptomonas and red algae. 

so the correct answer is 'All of the above'.

Consider the following pigments.
a. Chlorophyll a
b. Chlorophyll b
c. Chlorophyll c
d. Carotenes
e. Biliproteins
f. Xanthophylls
The characteristic photosynthetic pigments present in chlorophyceae would include.

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. $1, 2, 3$ and $4$

  2. $1, 3, 4$ and $5$

  3. $2, 3, 5$ and $6$

  4. $1, 2, 4$ and $6$

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Correct Option: A

Energy transfer in photosynthesis occurs as

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. Phycoerythrin$\rightarrow $Phycocyanin$\rightarrow $Carotenoid$\rightarrow $Chlorophyll a

  2. Chlorophyll b$\rightarrow $Carotenoid$\rightarrow $Phycoerthrin$\rightarrow $Chlorophyll a

  3. Phycocyanin$\rightarrow $Phycoerythrin$\rightarrow $Cartenoid$\rightarrow $Chlorophyll a

  4. Chlorophyll$\rightarrow $Cartenoid$\rightarrow $Phycocyanin$\rightarrow $Chlorophyll a

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Correct Option: C

Major Pigments in Phaeophycae :

botany photosynthesis types of chlorophyll pigments photosynthetic pigments

  1. Chlorophyll $a$

  2. Chlorophyll $c$

  3. Fucoxanthin

  4. All the above

Show answer
Correct Option: A

Which of the is the range for UV in spectroscopy?

botany photosynthesis action spectrum and absorption spectrum spectrum of electromagnetic radiation chloroplast and pigments of photosynthesis site of photosynthesis

  1. 400-700nm

  2. 500-800nm

  3. 200-300nm

  4. All of the above

Show answer
Correct Option: A
Explanation:

UV spectroscopy (400-700nm) is a type of absorption spectroscopy in which light of ultra-violet region is absorbed by the molecule resulting in the excitation of the electrons from the ground state to higher energy state. It obeys the Beer-Lambert law that states that when a beam of monochromatic light passes through a solution of an absorbing substance, the rate of decrease of intensity of radiation with the thickness of the absorbing solution is directly proportional to the incident radiation as well as the concentration of the solution.

So, the correct answer is '400-700nm'