Biology

Photosynthesis in Plants

1,492 Questions

Photosynthesis is the biological process by which plants convert light energy into chemical energy. This page contains practice questions covering essential topics like chlorophyll, light reactions, and the pathways specific to plants. This material is crucial for medical entrance exams and academic assessments.

Chlorophyll and pigmentsLight reactionsCalvin cycleCAM plantsElectron transportPhotosynthesis factors

Photosynthesis in Plants Questions

Multiple choice botany metabolism, cell respiration, and photosynthesis light dependent or hill reaction phases of photosynthesis emerson's experiments & hill's reaction

When chlorophyll absorbs light, it gets excited and emits (releases)

  1. Oxygen

  2. Water

  3. Electrons

  4. Energy rich compounds.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Photosynthesis takes place in the green leaves of plants and other green parts of plants like stem etc. When chlorophyll absorbs light, it gets excited and emits electrons. These chlorophylls are found in photosynthetic units called Photosystem I and Photosystem II. Each unit has a specific reaction center which contains pigment molecules. These molecules absorb light of different wavelengths and emit electrons. These electrons are picked up by an electron acceptor which passes them to an electron transport system of cytochromes.

Multiple choice

A reactant of photosynthesis is:

  1. Oxygen

  2. Your Agriculture Teacher

  3. Fish

  4. Carbon Dioxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbon dioxide is a primary reactant in photosynthesis, along with water and light energy. Oxygen is a byproduct.

Multiple choice

A product of photosynthesis is:

  1. Your Agriculture Teacher

  2. Carbon Dioxide

  3. Glucose

  4. Table Salt
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Glucose is the primary sugar produced during photosynthesis. Carbon dioxide is a reactant, and table salt is not involved.

Multiple choice

The process that plants use to make food is called

  1. digestion

  2. photosynthesis

  3. respiration

  4. sensitivity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plants perform photosynthesis to convert light energy into chemical energy, which serves as their food. Digestion is the breakdown of food in animals, while respiration is the process of releasing energy from food.

Multiple choice evs interdependence in our environment meaning of environment significance of biodiversity habitat and adaptation

Read the following statements and select the correct ones. 
(i) All the color components of the visible spectrum are available for marine plants living in different depths of the ocean.
(ii) Many herbs and shrubs in rain forests adapt to photosynthesis optimally under very low light conditions as they grow under canopy trees. 
(iii) Gradual increasing in average global temperature will affect the distributional range of some species.
(iv) The quality of sol does not depend upon the weathering process. 

  1. (i) and (ii)

  2. (ii) and (iv)

  3. (ii) and (iii)

  4. (i) and (iv)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

(i) At depth, the first colour to get absorbed is red then red and then yellow. Even water at 5Ft depth gets a noticeable loss of red.

(ii)By growing in canopy trees the herbs and shrubs adapt to photosynthesis under very low light.
(iii)There is some distributional range of different species if there is a gradual increase in average global temperature then it will affect it.
(iv)The quality of sol does highly depend on the weathering process.
So, the correct option is (ii) and (iii).

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Green house effect is due to the accumulation of

  1. $O _3$ and depletion of $CO _2$
  2. $O _3$ and $CO _2$
  3. $CO _2$ and depletion of $O _3$

  4. Green plants
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Carbon dioxide and ozone are called greenhouse gases due to their property of absorbing radiation and emitting heat, but the balanced effect depends upon the lifetime and longevity of these gases, Carbon dioxide has  increased in atmosphere due to increased burning of fossils, cutting of trees, Industrial application, trapping of heat waves can cause excessive heating of earth's temperature.
Ozone is naturally found in the stratosphere where it is constantly broken down by UV rays, but the burning of organic volatile compounds and emission of nitrogen oxides have led to the formation of the ozone layer in the atmosphere resulting in excessive trapping of heat
Hence, the correct answer is 'O$ _{3}$ and CO$ _{2}$'.
Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Green house effect is due to.

  1. Accumulation of $O _3$ and depletion of $O _2$
  2. Accumulation of $O _3$ and $CO _2$
  3. Depletion of $CO _2$ and $O _3$

  4. Accumulation of green plants
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The Greenhouse effect is a naturally occurring phenomenon that is responsible for heating of Earth's surface and atmosphere. It takes place due to accumulation of Ozone, Carbon dioxide, N$ _2$O, CFCs and methane in excess in atmosphere.
So, the correct answer is 'Option B- Accumulation of O$ _3$ and CO$ _2$'.
Multiple choice carbohydrates - definition and classification introduction to carbohydrates biomolecules chemistry

The light coming from the sun is stored as energy in plants by the process of photosynthesis. This happens by converting carbon dioxide and water into:

  1. green leaves

  2. carbohydrates

  3. fats

  4. plants hormones
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Photosynthesis is the process by which plants utilize the energy from the sunlight in order to convert carbon dioxide and water into carbohydrates.

Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Peroxisomes, in plant cells, are involved in

  1. Photooxidation

  2. Photorespiration

  3. Photophosphorylation

  4. Photolysis of water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Peroxisomes are microbodies which have enzymes for peroxide metabolism. They include :
(a) Peroxide producing oxidative enzymes like peroxidase, urate oxidase or uricase, amino acid oxidase and (b) Peroxide destroying enzymes like catalase.
Peroxisomes occur widely in animals cells, protists, fungi, higher plants but quite common in photosynthetic cells. In mesophyll cells, peroxisomes interact with chloroplasts, and mitochondria to take part in photorespiration.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Which is not true about sphaerosomes?

  1. Involved in photorespiration

  2. Arise from E.R.

  3. Related to fat metbolism

  4. Single membane bound
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sphaerosomes are single membrane bound organelles which takes part in storage and synthesis of fats. They were discovered by Perner (1953). Sphaerosomes are spherical bodies with a diameter of about 0.5-1 mm. They contain granular contents, rich in lipids but also have some proteins. Some proteins are probably enzymatic and take part in the synthesis of fat. But they are not involved in photorespiration.

Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

In which type of reactions related to plant photosynthesis peroxisomes are involved?

  1. Glycolate cycle

  2. Calvin cycle

  3. Bacterial photosynthesis

  4. Glyoxylate cycle
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glycolate cycle, also known as C$ _2$ cycle, is a complex metabolic pathway, that takes place in chloroplasts, mitochondria and peroxisomes of plant cells and is responsible for the formation of the amino acids, serine and glycine from non-phosphorylated intermediates of the carbon reduction cycle of photosynthesis.

Multiple choice

What are Primary Producers?

  1. Chemically infused kiwi abstract through strawberries

  2. Chemically infused strawberries

  3. Sunshine and rainbows

  4. They receive their energy from the sun in a process called photosynthesis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Primary producers are organisms that produce their own food using energy from sunlight, water, and carbon dioxide. This process is known as photosynthesis, and it forms the base of the food chain.