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 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
  1. Bright sun light

  2. Photosynthesis

  3. Algae and Plankton

  4. Respiration

Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Corals are marine invertebrates that require sunlight for photosynthesis (provided by zooxanthellae algae), which is essential for their growth. They also need plankton as a food source. Bright sunlight is crucial for the photosynthetic process. Respiration is a biological process, not a growth requirement specific to corals.

Multiple choice general knowledge science & technology
  1. Matrix of chloroplast

  2. Matrix of mitochondrion

  3. Inner membrane of mito-

  4. Grana of chloroplast

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

Oxidative phosphorylation occurs in the inner mitochondrial membrane where the electron transport chain is located. The proton gradient across this membrane drives ATP synthesis via ATP synthase. The matrix contains TCA cycle enzymes, and chloroplast structures are involved in photosynthesis, not respiration. Note: 'mito-' in option C is an abbreviation for mitochondrion.

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
  1. carbon

  2. sulphur

  3. auxin

  4. oxygen

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

Auxin is a plant hormone responsible for phototropism - the movement of plants toward light. When light hits one side of a plant, auxin redistributes to the shaded side, causing cells on that side to elongate more and bend the stem toward the light source. Charles Darwin first observed this phenomenon.

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.