Tag: photosynthetic pigments

Questions Related to photosynthetic pigments

Abscises acid is synthesized in.

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Chloroplasts

  2. Endoplasmic reticulum

  3. Ribosome's

  4. Peroxisomes

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Correct Option: A

Copper-containing blue protein found in the chloroplast is the.

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Plastocyanin

  2. Plastoquinone

  3. Cytochrome f

  4. Ferredoxin

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Correct Option: A

Extrusion or passage of chromatin from one cell into the cytoplasm of the adjoining cell is due to.

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Cytomixis

  2. Cytokinesis

  3. Inversions

  4. Translocation

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Correct Option: A

Photosynthetic Active Radiation (PAR) has the following range of wavelengths

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. 340-450 nm

  2. 450-950 nm

  3. 500-600 nm

  4. 400-700 nm

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Correct Option: D
Explanation:
Photosynthetic Active Radiation (PAR), designates the special range of solar radiations from 400 to 700 nm that photosynthetic organisms are able to use for the process of photosynthesis.
SO, the correct answer is '400-700 nm'.

Lowest pH inside chloroplast in day time must be found in _______________.

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Stroma

  2. Lumen

  3. Intermembrane space

  4. Thylakoid membrane

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Correct Option: A

The individual flattened stacks of membranous structures inside the chloroplasts are known as:

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Grana

  2. Stroma

  3. Thylakoids

  4. Cristae

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Correct Option: C
Explanation:
A thylakoid is a membrane-bound compartment inside chloroplasts. They are the site of the light-dependent reactions of photosynthesis. Thylakoids consist of a thylakoid membrane surrounding a thylakoid lumen. Chloroplast thylakoids frequently form stacks of disks referred to as grana. So the correct option is ' Thylakoid'

How many structures are of sporophytic origin?
Megasporocyte, Endothecium, Generative cell, Nucellus, Embryo sac, Sporogenous cell, Stigma. Integument

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Six

  2. Five

  3. Four

  4. Seven

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Correct Option: A

Which one is not character of antennae?

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. To make photosynthesis more efficient

  2. To make wider range of absorption of incoming light

  3. Provide electron to primary electron acceptor of photosystem

  4. Reaction center is not part of it

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Correct Option: C
Explanation:

The light harvesting complexes are made up of hundreds of pigment molecules bound to proteins. Each photosystem has all the pigments (except one molecule of chlorophyll a) forming a  light harvesting system also called antennae. These pigments help to make photosynthesis more efficient by absorbing different wavelengths of light. The single chlorophyll a molecules form the reaction center. Therefore, the reaction center is not a part of antennae. 

So, the correct option is 'Provide electron to primary electron acceptor of photosystem'.

Read the given statements A & B and choose the correct option.
A. The ribosomes of the chloroplasts are smaller than the cytoplasmic ribosomes.
B. Chloroplasts can synthesise some of their proteins but they receive other proteins from cytoplasm.

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. Only statement A is correct.

  2. Only statement B is correct.

  3. Both statements are correct.

  4. Both statements are incorrect.

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Correct Option: A
Explanation:

A. Chloroplast ribosomes are similar to those found in the prokaryotes that is 70s type. Eukaryotic ribosomes which are found in the cytoplasm are of 80stype.

B. Most chloroplast and mitochondrial proteins, however, are synthesized outside the organelle on cytosolic ribosomes that are not bound to the rough endoplasmic reticulum.
So the correct option is 'Only statement A is correct'.

In a chlorophyll molecule, the magnesium is situated in the

biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

  1. corners of porphyrin

  2. centre of porphyrin

  3. isocyclic ring

  4. phytol chamber

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Correct Option: B
Explanation:

A chlorophyll molecule has a hydrophobic "tail" that embeds the molecule into the thylakoid membrane. The "head" of a chlorophyll molecule is a ring called a porphyrin. The porphyrin ring of chlorophyll, which has a magnesium atom at its centre, is the part of a chlorophyll molecule that absorbs light energy.

So, the correct option is 'Centre of porphyrin'.