Biology Test 7

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Biology Test 7

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Weekly Quiz Competition

Question 1
4 / -1

Choose the correct number of meiotic divisions required for the formation of 100 grains of wheat.

A
125

B
100

C
50

D
20

Solution

The meiotic division is responsible for gamete formation. A wheat has a 4 pollen (4 after 1 meiotic division) and an egg cell (one after 1 meiotic division) to produce a single seed. To produce a single wheat grain there should be 100 meiotic divisions to produce hundred egg cells and 25 divisions to produce 100 pollen grains. So a total of 125 meiotic divisions are required.
Question 2
4 / -1

At atmospheric pressure, for a solution, water potential is equivalent to

A
Pressure potential

B
Solute potential

C
Both of these

D
None of these

Solution

Water potential= pressure potential+ solute potential

Water potential is different between the free energy of water molecules in pure water and free energy of water molecules in any solution. It depends on solute concentration and external pressure and at atmospheric pressure Water potential = Solute potential.
Question 3
4 / -1

Which of the following category of soil water is most readily available to plants?

A
Hygroscopic water and gravitational water

B
Capillary water and chemically combined water

C
Only capillary water

D
Only gravitational water

Solution

In gravitational water, the water is generally pulled down by the gravity and this water is not available to plants because due to gravitational force, it reaches to the water table.
Some amount of water held I. Capillary pores of the soil and this water is known as capillary water, which is the maximum available soul water to the plants.
The water which combined with the soil minerals is known as chemically combined water and this water is also not available to the plants.
In the hygroscopic category of water, water held in the soil after the drainage of capillary water. This water is also unavailable to the plants.
Question 4
4 / -1

From the given matches of elements and its function, choose the incorrect one.

A
Phosphorus- phosphorylation reaction

B
Calcium- synthesis of cell wall

C
Molybdenum- cell elongation and differentiation

D
Manganese- splitting of water to release oxygen during photosynthesis

Solution

Cell elongation and differentiation, carbohydrate translocation, pollen germination etc are functions of Boron. Molybdenum is a component of several enzymes that take part in nitrogen metabolism.
Question 5
4 / -1

In which form do plants use nitrogen?

A
Atmospheric nitrogen

B
Nitrite and nitrate

C
Nitrite alone

D
Nitrate alone

Solution

plants cannot take up atmospheric nitrogen directly. They convert it into simpler forms for easy uptake by plants. The two most common nitrogen compounds in soil are nitrates and nitrites.
Question 6
4 / -1

Which one of the following statement is incorrect w.r.t to the essentiality of minerals?

A
An element is necessary for normal growth and reproduction.

B
Mineral specific diseases can be cured only by providing the same mineral to the soil.

C
An element can be replaced by another element.

D
Plant metabolism is affected by the elements.

Solution

Minerals are specific and cannot be replaced by another mineral. Its deficiency can lead to change in the growth patterns.
Question 7
4 / -1

Water splitting complex is located in/on

A
the outer surface of granal membrane.

B
lumen of stroma lamellae.

C
the inner surface of thylakoid membrane.

D
stroma

Solution

The oxygen-evolving complex (OEC), also known as the water-splitting complex, is a water-oxidizing enzyme involved in the photo-oxidation of water during the light reactions of photosynthesis
It is located on thylakoid membrane of plants, green algae and cyanobacteria.
Question 8
4 / -1

Read the following statement and select the option which is incorrect. ,

a) PSI participates in both cyclic as well as-non-cyclic flow of electrons ,
b) The reaction center of PSII is P₆₈₀ ,
c) PSII is found in both grana and stroma lamellae ,
d) PSII is involved in photolysis of water

A
A

B
B

C
C

D
D

Solution

Photosynthesis consists of two photosystem that is PSI and PSII. One pigment system operates in short wavelength of light and other one operates in long wavelength of light. They both function jointly. Reaction center of PSI is P-700 and PSII is P-680. They are named in sequence of their discovery.
PSI participates in cyclic and noncyclic photophosphorylation. It is located on outer side of thylakoid membrane. PSII participates in only in non cyclic photophosphorylation. It is located on inner side of thylakoid membrane.
Question 9
4 / -1

The energy-releasing metabolic process in which substrate is oxidized without an external electron acceptor is called

A
glycolysis.

B
fermentation.

C
aerobic respiration.

D
photorespiration.

Solution

Fermentation is a metabolic process that consumes sugar in the absence of oxygen. Final products of fermentation are organic acids, gases or alcohol. The enzyme pyruvic acid, decarboxylase and alcohol dehydrogenase catalyze these reactions. It occurs in yeast and bacteria and also in oxygen-starved muscle cells. The science of fermentation is called zymology.
Question 10
4 / -1

The reactions of Kreb’s cycle takes place

A
in the cytoplasm.

B
in the endoplasmic reticulum.

C
in the matrix of mitochondria.

D
on the surface of mitochondria.

Solution

In eukaryotes the entire site of reaction of kreb’s cycle occur in the matrix if mitochondria.

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Biology Test 7

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Biology Test 7

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SHARING IS CARING

Question 1

125

100

50

20

Solution

Question 2

Pressure potential

Solute potential

Both of these

None of these

Solution

Question 3

Hygroscopic water and gravitational water

Capillary water and chemically combined water

Only capillary water

Only gravitational water

Solution

Question 4

Phosphorus- phosphorylation reaction

Calcium- synthesis of cell wall

Molybdenum- cell elongation and differentiation

Manganese- splitting of water to release oxygen during photosynthesis

Solution

Question 5

Atmospheric nitrogen

Nitrite and nitrate

Nitrite alone

Nitrate alone

Solution

Question 6

An element is necessary for normal growth and reproduction.

Mineral specific diseases can be cured only by providing the same mineral to the soil.

An element can be replaced by another element.

Plant metabolism is affected by the elements.

Solution

Question 7

the outer surface of granal membrane.

lumen of stroma lamellae.

the inner surface of thylakoid membrane.

stroma

Solution

Question 8

A

B

C

D

Solution

Question 9

glycolysis.

fermentation.

aerobic respiration.

photorespiration.

Solution

Question 10

in the cytoplasm.

in the endoplasmic reticulum.

in the matrix of mitochondria.

on the surface of mitochondria.

Solution

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