Biology

Photosynthesis in Plants

1,508 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

In the Oxygen Cycle plants

  1. take in carbon dioxide

  2. take in oxygen

  3. take in animals

  4. release carbon dioxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plants require carbon dioxide as a reactant for photosynthesis to produce glucose.

Multiple choice

The process in which glucose is synthesized by plants

  1. Photosythesis

  2. Eutrophication

  3. Respiration

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

Photosynthesis is the process by which plants synthesize glucose using sunlight, carbon dioxide, and water. It occurs primarily in chloroplasts of leaf cells.

Multiple choice

In the Nutrition: Leaves absorb oxygen

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plants primarily absorb carbon dioxide for photosynthesis, not oxygen. While they do exchange gases, the primary intake for food production is carbon dioxide.

Multiple choice

Which is a reactant of photosynthesis?

  1. Carbon monoxide

  2. Glucose

  3. Oxygen

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

Photosynthesis uses carbon dioxide and water as reactants to produce glucose and oxygen. Carbon monoxide is toxic and not a reactant, while glucose and oxygen are products.

Multiple choice

Which is a PRODUCT of photosynthesis?

  1. Oxygen

  2. Water

  3. Sunlight

  4. Carbon Monoxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oxygen is released as a byproduct of photosynthesis. Water and sunlight are inputs, and carbon monoxide is not involved in this process.

Multiple choice

What's SIMILAR about the carbon and nitrogen cycles?

  1. Animals gain both N and C through cellular respiration.

  2. Plants get both nitrogen and carbon from the air.

  3. Animals use consumption to get both N and C.

  4. Plants use photosynthesis to get both N and C.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both carbon and nitrogen are essential nutrients that animals obtain by consuming other organisms. Plants do not get both from the air, and animals do not get them through respiration.

Multiple choice

How is decomposition involved in the carbon cycle?

  1. Things take in carbon dioxide as they decompose.

  2. Things release carbon dioxide as they decompose.

  3. Decomposition is always accompanied by photosynthesis.

  4. Decomposition isn't involved in the carbon cycle.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Decomposers break down organic matter, and during this metabolic process, they release carbon dioxide back into the atmosphere as a byproduct of their cellular respiration.

Multiple choice

How does carbon move from nonliving to living things?

  1. cellular respiration

  2. dissolving

  3. photosynthesis

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

Photosynthesis is the process by which autotrophs (like plants) take inorganic carbon dioxide from the atmosphere and convert it into organic carbon (glucose), effectively moving carbon into the living world.

Multiple choice

fungi has chlorophyll

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fungi are heterotrophic organisms that obtain nutrients by absorbing organic matter. They lack chlorophyll and cannot perform photosynthesis.

Multiple choice

During Respiration leaves use __________

  1. Oxygen and Glucose

  2. Carbon-di-oxide and Water

  3. Oxygen and Water

  4. Carbon-di-oxide and Glucose
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During cellular respiration, plants (like other organisms) break down glucose in the presence of oxygen to release energy, producing carbon dioxide and water as byproducts.

Multiple choice

When does respiration take place in plants?

  1. During the day

  2. During the night

  3. It is a continuous process (day & night)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Respiration is a metabolic process that occurs continuously in all living cells, including plant cells, to provide energy for life functions.

Multiple choice

Palisade Mesophyll has air spaces between them

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The palisade mesophyll consists of tightly packed, column-shaped cells designed for maximum light absorption; it does not have significant air spaces.

Multiple choice

Spongy Mesophyll contains chlorophyll

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The spongy mesophyll contains chloroplasts and is responsible for photosynthesis, although it has fewer chloroplasts than the palisade layer.