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

Suppose you made an acidic interior of the thylakoids of isolated chloroplasts. Then, you transferred it in the dark to a pH-8 solution.

What would happen?

  1. Calvin cycle is activated.

  2. ATPs may be formed from isolated chloroplast.

  3. Both 1 and 2

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As isolated thylakoids were transferred from acidic medium to basic medium, H+ proton will be emitted in a higher amount that causes conversion of ADP to ATP in a high frequency.

Multiple choice

Suppose you made an acidic interior of the thylakoids of isolated chloroplasts. Then, you transferred it in the dark to a pH-8 solution.

When sunlight is on the chloroplast, what would happen?

  1. Thylakoids enclose the spaces

  2. Grana enclose the spaces

  3. Calvin cycle recurs

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As sunlight falls on the chloroplast, thylakoids will enclose their spaces and photosynthesis will be started in a normal way.

Multiple choice

During photorespiration the reactive oxygen species, H2O2 is produced in

  1. Glyoxysome

  2. Lysosome

  3. Peroxisome

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

During photorespiration, the oxidation of glycolate in the peroxisome produces hydrogen peroxide as a byproduct, which is subsequently broken down by the enzyme catalase into water and oxygen. Thus, the peroxisome is the primary site of H2O2 generation in this pathway.

Multiple choice

Which of the following statements in photosynthesis are CORRECT? P. The absorption maxima for photosystem I (PS I) and PS II are 680 nm and 700 nm, respectively. Q. Photosynthetic reaction centre contains 300 chlorophyll molecules and the release of one molecule of oxygen requires a minimum of 8 photons. R. The non-photochemical quenching of excitation energy is enhanced by the presence of zeaxanthin. S. The photochemical splitting of water occurs in PS I.

  1. P, Q

  2. R, S

  3. P, S

  4. Q, R
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice plant kingdom biology

In Chlamydomonas(a green algae) the number of chloroplast per cell is?

  1. $1$
  2. $2$
  3. $100$
  4. $1000$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chlamydomonas is a unicellular green alga that typically contains a single, cup-shaped chloroplast.

Multiple choice plant kingdom biology

Major photosynthetic pigments in green algae are

  1. Chl $a$ and $b$
  2. Chl $a$, $c$ and fucoxanthin
  3. Chl $a$, $d$ and phycoerythrin
  4. Chl $a$ and $c$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Green algae (Chlorophyceae) are characterized by the presence of chlorophyll a and chlorophyll b as their primary photosynthetic pigments.

Multiple choice

What products are created by the process of photosynthesis?

  1. the sun's light and energy

  2. oxygen and carbohydrates

  3. phosphorus and nitrogen

  4. carbon dioxide and water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Photosynthesis is the process by which plants use sunlight to convert water and carbon dioxide into oxygen and glucose (a carbohydrate). The inputs are light, water, and CO2, while the outputs are oxygen and sugar.