Photosynthesis in Higher Plants Test

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Photosynthesis in Higher Plants Test - 45

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Question 1
1 / -0

Oxysomes were discovered by

A
Palade

B
Benda

C
Fernandes-Moran

D
Luch and Rich
Solution
- Oxysomes refers to small round structures present within the folds of the cristae of the inner mitochondrial membrane.
- It is also known as F$$_0$$-F$$_1$$ particles.
- F$$_0$$ and F$$_1$$ particles are found in the inner mitochondrial region and are attached to the cristae and help in ATP production and oxidation.
- It is also known as Fernandez Moran particles (named after its discoverers).
- So, the correct answer is 'Fernandes-Moran'.
Question 2
1 / -0

Match the following
a. Bacteria 1. Synthesis and storage of lipids
b. Sphaerosomes 2. Idiogram
c. Chloroplasts 3. Glycocalyx
d. Karyotype 4. Thylakoids

A
a-3, b-1, c-4, d-2

B
a-3, b-1, c-2, d-4

C
a-4, b-3, c-2, d-1

D
a-1, b-2, c-3, d-4

E
a-3, b-2, c-4, d-1.
Question 3
1 / -0

Glycolate metabolism occurs in

A
Lysosome

B
Ribosomes

C
Glyoxysomes

D
Peroxisome
Solution
- A peroxisome is a small cellular organelle which contains reducing enzyme catalases and oxidases within the cytoplasm of a cell.
- The glycolate gets oxidized to glyoxylate by glycolate oxidase and later this glyoxylate gets converted to glycine by glyoxylate aminotransferase (glycolate metabolism) within peroxisomes.
- So, the correct answer is 'Peroxisome'.
Question 4
1 / -0

Which cellular part is correctly described

A
Thylakoids - Flattened membranous sacs forming grana

B
Centrioles - Sites for active RNA synthesis

C
Ribosomes - Those in chloroplasts are larger (80 S) while those in cytoplasm are smaller (70 S)

D
Lysosomes - Opimally active at 8.5 pH.
Question 5
1 / -0

In non-cyclic photophosphorylation the electron released by $$P_{680}$$ is replaced by

A
Plastoquinone

B
Water

C
$$CO_2$$

D
$$NADP^+$$.

Solution

Non-cyclic phosphorylation involves both Photosystem I and Photsystem II. These two photosystems work in series, first PS II and then PS I. The two photosystems are connected through an electron transport chain. $$NADPH$$ is synthesised by this kind of electron flow. Electrons are transferred from the PS II and then passed on to the pigments of PS I. Then, electrons get excited and transferred to another acceptor. These electrons are then moved downhill again to a molecule of $$NADP^{+}$$. The addition of these electrons results in formation of $$NADPH$$. The electron released from PS II by $$P_{680}$$ must be replaced. This is achieved by electrons available due to splitting of water. The water splitting complex is associated with PS II, which itself is physically located on the inner side of the membrane of the thylakoid. Water is split into $$H^{+}$$, $$[O]$$ and electrons. The protons and oxygen formed by splitting of water is released within the lumen of the thylakoids. The oxygen produced is released as one of the net products of photosynthesis.
$$2H_{2}O$$ $$\longrightarrow$$ $$4H^{+}$$ + $$O_{2}$$ + $$4e^{-}$$
Question 6
1 / -0

The photosynthetic unit having 250 chlorophyll molecules is called

A
Photon

B
Quantum

C
Quantasome

D
Oxysomes.

Solution

The photosynthetic unit having 250 chlorophyll molecules is called quantasome. It is present in the thylakoid membrane of chloroplast of plant cells. It was discovered by Park and Biggins. They are formed equally of lipids and proteins. Its dimensions are 185 A long, 155 A wide and 100 A thick. In quantasome, pigments are found to be present on the basis of absorption spectra in the form of a pyramid. Enzymes required for photophosphorylation are located in quantasome of chloroplasts.
Question 7
1 / -0

Agranal chloroplasts are found in some ____________.

A
Succulents

B
Hydrophytes

C
$$C_4$$ plants

D
$$C_3$$ plants.
Question 8
1 / -0

Energy required to synthesise ATP from ADP and inorganic phosphate is

A
2500 cal

B
7600 cal

C
12000 cal

D
20000 cal
Question 9
1 / -0

Chlorophyll was first extracted by

A
Van Mayer

B
Pelletier and Caventou

C
Willstatter and Stoll

D
Senebier.

Solution

Chlorophyll is a green pigment found in almost all plants, algae and cyanobacteria. The green colour of leaves is due to the presence of chlorophyll. It is primary photosynthetic pigment because it is primarily involved in the process of photosynthesis. It absorbs the light coming from the sun which is a very important factor in the process of photosynthesis. Chlorophyll was first extracted by Pelletier and Caventou in 1817. At the time of their work, scientists know that green plants consume carbon dioxide and release oxygen.
Question 10
1 / -0

ATP synthesis proposed by Peter Mitchell is

A
Phosphorylation

B
Photophosphorylation

C
Oxidative phosphorylation

D
Chemiosmotic synthesis
Solution
Peter Mitchell proposed a theory to explain the production of ATP which is 'Mitchell's chemiosmotic coupling hypothesis'. According to this theory:
Inner membrane of mitochondria acts as a transducer of energy and converts energy to chemical energy of ATP along the electrochemical gradient.
Inner mitochondrial membrane is impermeable to NADH, ATP, H+, OH-.
ATP synthesis and electron transport are coupled with proton gradient.
So the answer is 'Chemiosmotic synthesis'.

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Re-Attempt Weekly Quiz Competition

a.	Bacteria	1.	Synthesis and storage of lipids
b.	Sphaerosomes	2.	Idiogram
c.	Chloroplasts	3.	Glycocalyx
d.	Karyotype	4.	Thylakoids

Photosynthesis in Higher Plants Test - 45

Result

Photosynthesis in Higher Plants Test - 45

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Rank

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SHARING IS CARING

Question 1

Palade

Benda

Fernandes-Moran

Luch and Rich

Solution

Question 2

a-3, b-1, c-4, d-2

a-3, b-1, c-2, d-4

a-4, b-3, c-2, d-1

a-1, b-2, c-3, d-4

a-3, b-2, c-4, d-1.

Question 3

Lysosome

Ribosomes

Glyoxysomes

Peroxisome

Solution

Question 4

Thylakoids - Flattened membranous sacs forming grana

Centrioles - Sites for active RNA synthesis

Ribosomes - Those in chloroplasts are larger (80 S) while those in cytoplasm are smaller (70 S)

Lysosomes - Opimally active at 8.5 pH.

Question 5

Plastoquinone

Water

$$CO_2$$

$$NADP^+$$.

Solution

Question 6

Photon

Quantum

Quantasome

Oxysomes.

Solution

Question 7

Succulents

Hydrophytes

$$C_4$$ plants

$$C_3$$ plants.

Question 8

2500 cal

7600 cal

12000 cal

20000 cal

Question 9

Van Mayer

Pelletier and Caventou

Willstatter and Stoll

Senebier.

Solution

Question 10

Phosphorylation

Photophosphorylation

Oxidative phosphorylation

Chemiosmotic synthesis

Solution

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