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 general knowledge science & technology
  1. Carotene

  2. Xanthophyll

  3. Mitochondria

  4. Chlorophyll

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chlorophyll is the primary green pigment found in plants, responsible for absorbing light energy during photosynthesis. While carotene and xanthophyll are also plant pigments, they appear orange and yellow respectively, not green. Mitochondria are organelles involved in energy production, not pigments.

Multiple choice general knowledge science & technology
  1. Chromoplast

  2. Chloroplast

  3. Leucoplast

  4. Chrolophyll

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chromoplasts are plastids that contain pigments giving color to plant parts like fruits, flowers, and aging leaves. They synthesize and store pigments such as carotenoids (red, orange, yellow). Chloroplasts contain chlorophyll for photosynthesis (green), leucoplasts store colorless starch/proteins, and chrolophyll is a misspelling of chlorophyll.

Multiple choice general knowledge science & technology
  1. Water

  2. Chlorophyll

  3. Carbon Di-Oxide

  4. Oxygen

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oxygenic photosynthesis uses water, carbon dioxide, and light energy to produce glucose and oxygen. The oxygen released comes from the splitting of water molecules during the light-dependent reactions, not from carbon dioxide. This process occurs in plants, algae, and cyanobacteria. Water is consumed, not produced; chlorophyll is a pigment that absorbs light, not a byproduct.

Multiple choice general knowledge science & technology
  1. Acid Rain

  2. Photosynthesis

  3. Stomata

  4. Carbon and Oxygen cycle

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Acid rain is an environmental phenomenon caused by pollution, while photosynthesis, stomata, and carbon/oxygen cycles are all biological processes related to plants. Acid rain is the odd one out as it's harmful rather than a natural biological function.

Multiple choice general knowledge science & technology
  1. Pheophytin

  2. Xanthophyll

  3. Chlorophyll

  4. Carotene

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chlorophyll is the primary green pigment responsible for photosynthesis in plants, absorbing light in the blue and red parts of the spectrum while reflecting green light. Carotene and xanthophyll are carotenoids that produce yellow-orange colors, while pheophytin is a degradation product of chlorophyll that lacks its characteristic green color.

Multiple choice general knowledge science & technology
  1. an exothermic process

  2. an endothermic process

  3. a neutral process

  4. a thermostatic process

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Photosynthesis is an endothermic (energy-absorbing) process because it requires energy input from sunlight to convert carbon dioxide and water into glucose and oxygen. The process stores energy in chemical bonds, which is why it's considered endothermic.

Multiple choice general knowledge science & technology
  1. Stomata

  2. Chlorophyll

  3. Tendrils

  4. Starch

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chlorophyll is the green pigment found in plants, algae, and cyanobacteria. It is essential for photosynthesis as it absorbs light energy (mostly in the blue and red spectrum) and converts it into chemical energy. Stomata are pores for gas exchange, tendrils are climbing organs, and starch is a carbohydrate storage product.