Tag: photosynthetic pigments

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Questions Related to photosynthetic pigments

Multiple choice biology protectors of biosphere structure of chloroplast plastids 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

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

Photosynthetic pigments found in the chloroplasts occur in

  1. Thylakoid membranes

  2. Plastoglobules

  3. Matrix

  4. Chloroplast envelope.
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Chloroplasts stroma of higher plants contains

  1. Chlorophyll

  2. Light dependent reaction enzymes

  3. Light independent reaction enzymes

  4. Lysosomes
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Dimorphic chloroplasts occur in

  1. Pea

  2. Mango

  3. Sugarcane

  4. Cotton
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Cytochrome $b _6$ and cytochrome f occur in

  1. Ribosomes

  2. Mitochondria

  3. Chloroplasts

  4. Lysosomes
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Ground substance of chloroplast is

  1. Stoma

  2. Stroma

  3. Granum

  4. Cisterna.
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

In chloroplast, the highest number of protons are found in

  1. Antenna complex

  2. Stroma

  3. Lumen of thylakoids

  4. Inter-membrane space
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Chlorophyll molecules are located in

  1. Thylakoid membrane

  2. Thylakoid lumen

  3. Stroma

  4. Inner chloroplast membrane
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Thylakoids possess photosynthetic units called

  1. Quantasomes

  2. Glyoxysomes

  3. Polysomes

  4. Ribosomes
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Quantasomes occur on the surface of

  1. Cristae

  2. Plasmalemma

  3. Nuclear envelope

  4. Thylakoids
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.