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

What is the process by which plants release oxygen into the atmosphere?

  1. Photosynthesis

  2. Cellular respiration

  3. Fermentation

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

Photosynthesis is the process by which plants release oxygen into the atmosphere. This oxygen is used by animals and other organisms for respiration.

Multiple choice

What is the process by which plants respond to light?

  1. Phototropism

  2. Geotropism

  3. Thigmotropism

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

Phototropism is the process by which plants respond to light. It involves the growth of the plant towards or away from the light.

Multiple choice

What is the term used to describe the process by which plants respond to light?

  1. Tropism

  2. Nastic Movement

  3. Phototropism

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

Phototropism is the process by which plants respond to light.

Multiple choice

What is the primary process in photochemistry?

  1. Absorption of light

  2. Emission of light

  3. Chemical reaction

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

The primary process in photochemistry is the absorption of light by a molecule, which leads to the excitation of an electron to a higher energy level.

Multiple choice

What is the process by which an excited molecule returns to its ground state, releasing energy in the form of light?

  1. Fluorescence

  2. Phosphorescence

  3. Internal Conversion

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

Fluorescence is the process by which an excited molecule returns to its ground state, releasing energy in the form of light with the same wavelength as the absorbed light.

Multiple choice

What is the term for the chemical reaction initiated by the absorption of light?

  1. Photolysis

  2. Photodissociation

  3. Photoionization

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

Photolysis is the term for the chemical reaction initiated by the absorption of light, which results in the breaking of chemical bonds.

Multiple choice

What is the term for the photochemical reaction in which a molecule absorbs a photon and undergoes a change in its molecular structure?

  1. Photoisomerization

  2. Photocycloaddition

  3. Photooxidation

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

Photoisomerization is the term for the photochemical reaction in which a molecule absorbs a photon and undergoes a change in its molecular structure, resulting in the formation of an isomer.

Multiple choice

What is the term for the photochemical reaction in which a molecule undergoes reduction?

  1. Photoreduction

  2. Photooxidation

  3. Photodissociation

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

Photoreduction is the term for the photochemical reaction in which a molecule undergoes reduction, typically involving the transfer of electrons from a reducing agent.

Multiple choice

What is the term for the photochemical reaction in which a molecule loses an electron?

  1. Photoionization

  2. Photodissociation

  3. Photooxidation

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

Photoionization is the term for the photochemical reaction in which a molecule loses an electron, typically resulting in the formation of a positive ion.

Multiple choice

What is the term for the photochemical reaction in which a molecule breaks apart into smaller fragments?

  1. Photodissociation

  2. Photoionization

  3. Photooxidation

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

Photodissociation is the term for the photochemical reaction in which a molecule breaks apart into smaller fragments, typically involving the breaking of chemical bonds.

Multiple choice

What is the term for the photochemical reaction in which a molecule undergoes a change in its spin state?

  1. Intersystem Crossing

  2. Internal Conversion

  3. Fluorescence

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

Intersystem Crossing is the term for the photochemical reaction in which a molecule undergoes a change in its spin state, typically from a singlet state to a triplet state or vice versa.

Multiple choice

What is the term for the photochemical reaction in which a molecule undergoes a change in its electronic configuration?

  1. Internal Conversion

  2. Intersystem Crossing

  3. Fluorescence

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

Internal Conversion is the term for the photochemical reaction in which a molecule undergoes a change in its electronic configuration, typically from a higher energy state to a lower energy state, without emitting light.

Multiple choice

What is the term for the photochemical reaction in which a molecule emits light after absorbing energy?

  1. Fluorescence

  2. Phosphorescence

  3. Internal Conversion

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

Fluorescence is the term for the photochemical reaction in which a molecule emits light after absorbing energy, typically with a short delay after excitation.

Multiple choice

What is the process by which plants convert light energy into chemical energy?

  1. Cellular respiration

  2. Photosynthesis

  3. Glycolysis

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

Photosynthesis is the process by which plants convert light energy into chemical energy. It occurs in the chloroplasts of plant cells and involves the use of sunlight, water, and carbon dioxide to produce glucose and oxygen.

Multiple choice

Which of the following is the primary pigment involved in photosynthesis?

  1. Chlorophyll a

  2. Chlorophyll b

  3. Carotene

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

Chlorophyll a is the primary pigment involved in photosynthesis. It is a green pigment that absorbs light energy from the sun and uses it to drive the chemical reactions of photosynthesis.