Tag: photosynthetic pigments

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Questions Related to photosynthetic pigments

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

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

  1. Rosa, Prunus

  2. Crinum, Raphanus

  3. Arachis, Cicer

  4. Linum, Olea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In some plants, the endosperm contains chlorophyll and is photosynthetic. Examples include species like Rosa and Prunus.

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

Which of these is a type of phycobilin pigments?

  1. Phycocyanin

  2. Allophycocyanin

  3. Phycoerythrin

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

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.

  1. $1, 2, 3$ and $4$
  2. $1, 3, 4$ and $5$
  3. $2, 3, 5$ and $6$
  4. $1, 2, 4$ and $6$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chlorophyceae (green algae) typically contain chlorophyll a, chlorophyll b, carotenes, and xanthophylls.

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

Energy transfer in photosynthesis occurs as

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During photosynthesis, light energy is captured by accessory pigments and transferred efficiently toward the reaction center chlorophyll a. The correct energy transfer sequence is phycoerythrin to phycocyanin to carotenoids to chlorophyll a.

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

Major Pigments in Phaeophycae :

  1. Chlorophyll $a$
  2. Chlorophyll $c$

  3. Fucoxanthin

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phaeophyceae, or brown algae, contain chlorophyll a, chlorophyll c, and carotenoids such as fucoxanthin, which give them their characteristic brown color. Since all the listed pigments are indeed found in brown algae, the correct choice is that all of the above are major pigments.

Multiple choice biology photosynthesis in higher plants types of chlorophyll pigments photosynthetic pigments

Which of the below statements is/are not correct regarding chlorophyll a molecule?

(i) Molecule formula of chl a is $C _{55}H _{72}O _5N _4Mg$
(ii) It is the primary photosynthetic pigment.
(iii) In the pure state, it is red in colour and thus it absorbs more blue wavelength of light than the red wavelength. 
(iv)It is a soluble in water as well as petroleum ether.

  1. (i) and (iii)

  2. (iii) and (iv)

  3. (ii) only

  4. (iv) only
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chlorophyll a is the primary photosynthetic pigment, which is bluish green in the pure state. It has an empirical formula $C _{55}H _{72}O _5N _4Mg$and molecular weight of $893$. It absorbs more red wavelength of light than violet blue . It is soluble in a number of organic solvents such as petroleum ether. 

So, the correct answer is ' In the pure state, it is red in colour and thus it absorbs more blue wavelength of light than the red wavelength and It is a soluble in water as well as petroleum ether'.

Multiple choice biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

Which of the following processes forms chemical potential energy from electromagnetic energy?

  1. Respiration

  2. Photosynthesis

  3. Decomposition

  4. Nitrogen fixation

  5. Fermentation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Electromagnetic energy is the same as radiation or light energy. This type of kinetic energy can take the form of visible light waves, like the light from a candle or a light bulb, or invisible waves, like radio waves, microwaves, x-rays and gamma rays. Further, irrespective of where radiation is coming from, it can travel in a vacuum. The electromagnetic energy in plants can be converted to stored chemical energy during photosynthesis. 

Multiple choice biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

Which of the following is responsible for the red, orange and yellow colour of leaves?

  1. Carotenoids

  2. ATP

  3. Leaf decay

  4. Chlorophyll

  5. Over abundance of water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Option 'A' is correct.

Carotenoids are responsible for the red, orange and yellow color of leaves. Carotenoids are present with chlorophyll, but in summer the leaves are green because of high levels of chlorophyll. Summer masks the color of carotenoids, During autumn, the color of carotenoids becomes more noticeable because of the degradation of chlorophyll. As the autumn progresses, carotenoids also degrade along with chlorophyll but at a much slower rate. Hence the yellow, orange, red colors become visible.   

Multiple choice biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

The factory for synthesis of sugars in autotrophic eukaryotes is

  1. Chloroplast

  2. Mitochondrion

  3. Endoplasmic reticulum

  4. Ribosome
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chloroplasts are the cell organelles where photosynthesis occurs. The light reactions occur in thylakoid membranes and dark reactions occur in stroma of chloroplasts. These reactions result in synthesis of sugars (glucose) in chloroplasts.

Multiple choice biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

The light is trapped by photosynthetic pigments presents in the 

  1. Stroma

  2. Grana

  3. Quantosomes

  4. Periplastidial space
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The chloroplast is the cell organelles present in plant cells that are responsible for initiating the process of photosynthesis. Chloroplasts are double-membrane bound structures. The stroma of chloroplast is the jelly-fluid like structure in which another membrane system is presently called the thylakoids. These thylakoids are stacked upon each other to form the structure called grana. The grana are connected with each other by an extension of thylakoids called stroma lamellae. Thylakoid of grana has the photosynthetic pigments embedded in it that perform the trapping of sunlight and begin the light reaction of the photosynthesis.

A. Stroma is the region where the dark reaction of the photosynthesis occurs.
B. Grana is the region where the light reaction occurs through the trap of light by the photosynthetic pigment.
C. Quantasomes are the photosynthetic units made of pigments and are present in the grana.
D. Periplastidial space is the region between the inner membrane and the outer membrane of the plastids.
Hence, the correct answer is 'Grana'