Tag: photosynthetic pigments

Questions Related to photosynthetic pigments

Match the columns and identify the correct option.

I II
(a) Thylakoids (i) Disc shaped sacs in Golgi apparatus
(b) Cristae (ii) Condensed structure of DNA
(c) Cisternae (iii) Flat membranous sacs in stroma
(d) Chromatin (iv) Infoldings in mitochondria
biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. a-iv, b-iii, c-i, d-ii

  2. a-iii, b-iv, c-i, d-ii

  3. a-iii, b-i, c-iv, d-ii

  4. a-iii, b-iv, c-ii, d-i

Show answer
Correct Option: B
Explanation:
a) Thylakoid (internal photosynthetic membranes) is a membrane-bound compartment present within the stroma (ground matrix) of the cellular organelle called chloroplast.
b) The inner mitochondrial membrane has folds called cristae which helps in increasing the surface area.
c) The folds of the Golgi apparatus are called cisternae which are called the functional units of this organelle.
d) Chromatin is a viscous, gelatinous substance made up of DNA, RNA, basic proteins called histones or acidic proteins called nonhistones.
So, the correct answer is 'a-iii, b-iv, c-i, d-ii'.

Photosynthetic pigments found in the chloroplasts occur in

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Thylakoid membranes

  2. Plastoglobules

  3. Matrix

  4. Chloroplast envelope.

Show answer
Correct Option: A
Explanation:

Photosynthetic or chloroplasts pigments that are found in the thylakoid membrane constitute grana of chloroplasts are the organic molecules that absorb light of specific wavelengths in the visible region due to the presence of conjugated double bonds and are chlorophyll a and b, carotenoids and xanthophylls.

So the correct option is 'Thylakoid membranes'.

Chloroplasts stroma of higher plants contains

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Chlorophyll

  2. Light dependent reaction enzymes

  3. Light independent reaction enzymes

  4. Lysosomes

Show answer
Correct Option: C
Explanation:

A) Chlorophyll is located within the thylakoid membrane. But chlorophyll is present in both lower (algae) and higher plants and some bacteria as well.
B) The light-dependent reactions use light energy to make ATP and NADPH. This is also seen in lower plants.

C) Light-independent enzymes RuBisCO and RuBP are present only in higher plants.
D) Lysosomes are usually present in animal cells. They can be present in lower plants.
So the correct answer is 'Light independent reaction enzymes'.

Dimorphic chloroplasts occur in

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Pea

  2. Mango

  3. Sugarcane

  4. Cotton

Show answer
Correct Option: C
Explanation:

Chloroplast of C4 plants is dimorphic chloroplast because it shows two different types of the chloroplast. 

1). The chloroplast with grana

2). Chloroplast without grana and surrounded to the vascular bundle. 

The chloroplast is of 2 different types hence it's called as the dimorphic chloroplast. And it is best seen among sugarcane of the C4 plants.

So, the correct option is 'Sugarcane'.

Cytochrome $b _6$ and cytochrome f occur in

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Ribosomes

  2. Mitochondria

  3. Chloroplasts

  4. Lysosomes

Show answer
Correct Option: C
Explanation:

The cytochrome b6f complex is an enzyme found in the thylakoid membrane in the chloroplast of plants, cyanobacteria, and green algae, that catalyzes the transfer of electrons from plastoquinol to plastocyanin.


So, the correct option is 'Chloroplast'.

Ground substance of chloroplast is

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Stoma

  2. Stroma

  3. Granum

  4. Cisterna.

Show answer
Correct Option: B
Explanation:
Chloroplast is a double membrane structure which is only present in plants . Chloroplast has fluid which is called stroma it is responsible for dark reaction . There are sac like structure present in it which are called thylakoids which which help in light reaction.

So, the correct option is 'Stroma'.

In chloroplast, the highest number of protons are found in

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Antenna complex

  2. Stroma

  3. Lumen of thylakoids

  4. Inter-membrane space

Show answer
Correct Option: C
Explanation:

During photosynthetic electron transport, protons (H$^+$) accumulate in the thylakoid space. These protons are released into thylakoid space after each split of water molecule during photooxidation and after each electron transport between PQH$ _2$ to cytochrome-f. Increase in the number of protons in the thylakoid space results in an increase in a proton gradient.

Hence, the correct answer is 'Lumen of thylakoids'.

Chlorophyll molecules are located in

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Thylakoid membrane

  2. Thylakoid lumen

  3. Stroma

  4. Inner chloroplast membrane

Show answer
Correct Option: A
Explanation:

A) The green pigment chlorophyll is located within the thylakoid membrane.

B) The thylakoid lumen does not contain chlorophyll.
C) The stroma does not contain any pigments.
D) The inner chloroplast membrane does not contain any pigments.
So the correct answer is 'Thylakoid membrane'.

Thylakoids possess photosynthetic units called

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Quantasomes

  2. Glyoxysomes

  3. Polysomes

  4. Ribosomes

Show answer
Correct Option: A
Explanation:

Quantasomes are particles found in the thylakoid membrane of chloroplasts in which photosynthesis takes place. They are embedded in a paracrystalline array on the surface of thylakoid discs in chloroplasts.

So, the correct option is 'Quantasomes'.

Quantasomes occur on the surface of

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Cristae

  2. Plasmalemma

  3. Nuclear envelope

  4. Thylakoids

Show answer
Correct Option: D
Explanation:

Quantasomes are composed of lipids and proteins that include various photosynthetic pigments and redox carriers. These are the particles found in the thylakoid membrane of chloroplasts in which photosynthesis takes place. They are embedded in a paracrystalline array on the surface of thylakoid discs in chloroplasts.

So, the correct option is 'Thylakoids'.