Photosynthesis in Higher Plants Test

Result

Photosynthesis in Higher Plants Test - 35

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

In the process of photosynthesis,

A
$$O_{2}$$ is taken and $$CO_{2}$$ is evolved.

B
$$O_{2}$$ is taken and $$CO_{2}$$ is not evolved.

C
$$CO_{2}$$ is taken and $$CO_{2}$$ is evolved.

D
$$CO_{2}$$ is taken and $$O_{2}$$ is evolved.
Solution
Solution :
The correct answer is the option D.
The solution for the correct answer is ,
cells use carbon dioxide and energy from the Sun to make sugar and oxygen molecules.
which means CO2 is taken O2 is evolved.
Question 2
1 / -0

During photosynthesis,

A
O$$_{2}$$ is evolved from CO$$_{2}$$.

B
ATP is formed.

C
ATP is not formed.

D
Water is required as medium but it does not take part in photosynthesis.

Solution

The process of photosynthesis takes place in plants and involves the production of ATP. It takes place in two phases - light reaction and dark reaction. ATP and NADPH$$_2$$ are the major product of the light reaction.
So, the correct answer is option B.
Question 3
1 / -0

The full form of NAD is

A
Adenosine diphosphate.

B
Nicotinamide adenosine dinucleotide.

C
Nicotinamide adenine dinucleotide.

D
None of the above.

Solution

Nicotinamide adenine dinucleotide (NAD) is a coenzyme found in all living cells. The compound is a dinucleotide, because it consists of two nucleotides joined through their phosphate groups. One nucleotide contains an adenine base and the other nicotinamide.
Question 4
1 / -0

NADP reduces to NADPH$$_{2}$$ in

A
PS- I

B
PS- II

C
Calvin cycle

D
Non-cyclic photophosphorylation

Solution

Phosphorylation means synthesis of ATP in presence of sunlight. The process of photophosphorylation occurs during photosynthesis and produces ATP, which is used subsequently in reduction of carbon dioxide during dark reaction. The photophosphorylation can be cyclic photophosphorylation or non cyclic photophosphorylatIon. During non cyclic photophosphorylation both ATP and $$NADPH_2$$ are produced, whereas during cyclic photophosphorylation only ATP is produced.
Question 5
1 / -0

The first acceptor of $$CO_{2}$$ in $$C_{4}$$ plant is ______.

A
Pyruvic acid

B
Phosphoenol pyruvic acid

C
Acetic acid

D
Oxaloacetic acid

Solution

In C$$_4$$ plants, the initial fixation of CO$$_2$$ occurs in mesophyll cells. The primary acceptor of CO$$_2$$ is phosphoenol pyruvate or PEP. It combines with CO$$_2$$ in the presence of PEPcase to form oxaloacetic acid.
PEP + CO$$_2$$ + H$$_2$$O $$\rightarrow$$ Oxaloacetic acid + H$$_3$$PO$$_4$$
So, the correct answer is option B.
Question 6
1 / -0

The first reaction in photorespiration is

A
Carboxylation.

B
Decarboxylation.

C
Oxygenation.

D
Phosphorylation.

Solution

The enzyme RuBP carboxylase/oxygenase (RuBisCO) catalyzes $$CO_2$$ fixation in the Calvin cycle by attaching $$CO_2$$ to RuBP. As its full name implies, RuBisCO acts not only as a carboxylase but also as an oxygenase because, high levels of $$O_2$$ compete with $$CO_2$$ for the active site of RuBisCO. This process is called photorespiration, because it occurs in the presence of light; and as in aerobic respiration, it requires oxygen and produces $$CO_2$$ and $$H_2O$$. However, photorespiration does not produce ATP, and it reduces photosynthetic efficiency, because it removes some of the intermediates used in the Calvin cycle. The first reaction of this pathway is oxygen fixing reaction, which produces 2 phoshpoglycolate and 3 phosphoglyceric acid. This reaction occurs in the chloroplast.
Question 7
1 / -0

Which one of the following is a wasteful process?

A
Photorespiration

B
Respiration

C
Photosynthesis

D
ETS

Solution

Photorespiration is a characteristic of $$C_3$$ plants. It is not present in $$C_4$$ plants. In the photorespiratory pathway, there is neither synthesis of sugars, nor of ATP. Rather it results in the release of $$CO_2$$ with the utilisation of ATP. In the photorespiratory pathway there is no synthesis of ATP or NADPH. Therefore, photorespiration is a wasteful process.
Question 8
1 / -0

Photorespiration takes place in which of the following organelles?

A
Chloroplast and mitochondria.

B
Mitochondria and peroxisome.

C
Bundle sheath cells and chloroplasts.

D
Chloroplast, peroxisome and mitochondria.

Solution

Photorespiration is a wasteful process, which occurs in $$C_3$$ plants. It happens due to oxygenase activity of RuBisCO. Due to oxygenase activity of RuBisCO, oxygen rather than carbon dioxide is fixed in the first reaction of Calvin cycle. Here the RuBP instead of being converted to 2 molecules of phosphoglyceric acid (PGA) binds with $$O_2$$ to form one molecule of PGA and phosphoglycolate. In the photorespiratory pathway, there is neither synthesis of sugars, nor of ATP. Rather it results in the release of $$CO_2$$ with the utilisation of ATP. In the photorespiratory pathway there is no synthesis of ATP or NADPH. Therefore, photorespiration is a wasteful process.This pathway occurs in three cell organelles- chloroplast, peroxisomes and mitochondria.
Question 9
1 / -0

Peroxisome is associated with................

A
Photorespiration.

B
Photosynthesis.

C
Photoperiodism.

D
Phototropism.

Solution

Photorespiration is a wasteful process that occurs in $$C_3$$ plants. During photorespiration no carbon dioxide is fixed, rather fixed carbon is released as carbon dioxide, no ATP is synthesized, rather ATP is used up. The process of photorespiration occurs in three cell organelles, like chloroplast, peroxisomes and mitochondria.
Question 10
1 / -0

In case of $$C_{4}$$ plants, the acceptor of $$CO_{2}$$ is

A
Phosphoglyceraldehyde.

B
Ribulose monophosphate.

C
Phosphoenolpyruvate.

D
Ribulose diphosphate.

Solution

Tropical grasses like sugarcane, sorghum etc are $$C_4$$ plants. They fix carbon dioxide by Hatch and Slack cycle. These plants do not show photorespiration and are hence better photosynthesizers than $$C_3$$ plants. These plants have Kranz anatomy. These plants have a special ring of thick walled bundle sheath cells around vascular bundle. The bundle sheath cells lack intercellular spaces. They have large chloroplasts without grana. In the bundle sheath cells carbon dioxide is fixed by the enzyme RuBisCO. After carbon dioxide fixation by RuBisCO, Calvin cycle proceeds as in $$C_3$$ plants. The mesophyll cells are the usual cell type as found in $$C_3$$ plants also. Initial carbon dioxide fixation into organic acids occurs in the mesophyll cells. The initial carbon dioxide acceptor is phosphoenolpyruvic acid (PEP) and the initial carboxylating enzyme is PEP carboxylase.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Photosynthesis in Higher Plants Test - 35

Result

Photosynthesis in Higher Plants Test - 35

Score

-

Rank

-

SHARING IS CARING

Question 1

$$O_{2}$$ is taken and $$CO_{2}$$ is evolved.

$$O_{2}$$ is taken and $$CO_{2}$$ is not evolved.

$$CO_{2}$$ is taken and $$CO_{2}$$ is evolved.

$$CO_{2}$$ is taken and $$O_{2}$$ is evolved.

Solution

Question 2

O$$_{2}$$ is evolved from CO$$_{2}$$.

ATP is formed.

ATP is not formed.

Water is required as medium but it does not take part in photosynthesis.

Solution

Question 3

Adenosine diphosphate.

Nicotinamide adenosine dinucleotide.

Nicotinamide adenine dinucleotide.

None of the above.

Solution

Question 4

PS- I

PS- II

Calvin cycle

Non-cyclic photophosphorylation

Solution

Question 5

Pyruvic acid

Phosphoenol pyruvic acid

Acetic acid

Oxaloacetic acid

Solution

Question 6

Carboxylation.

Decarboxylation.

Oxygenation.

Phosphorylation.

Solution

Question 7

Photorespiration

Respiration

Photosynthesis

ETS

Solution

Question 8

Chloroplast and mitochondria.

Mitochondria and peroxisome.

Bundle sheath cells and chloroplasts.

Chloroplast, peroxisome and mitochondria.

Solution

Question 9

Photorespiration.

Photosynthesis.

Photoperiodism.

Phototropism.

Solution

Question 10

Phosphoglyceraldehyde.

Ribulose monophosphate.

Phosphoenolpyruvate.

Ribulose diphosphate.

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.