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
  1. Green

  2. Red and purple

  3. Orange and yellow

  4. All of these

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

Yes, it is the correct. The coloured leaves have chlorophyll too. Here, the green colour is not visible to our eyes, as it is present in very less amount. Hence, we can say that all the leaves possess chlorophyll.

Multiple choice
  1. Gerontoplasts

  2. Leucoplasts

  3. Chromoplasts

  4. Chloroplasts

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

Leucoplasts are required for monoterpene synthesis. Monoterpenes are terpenes, a class of organic compounds, produced by a variety of plants, particularly conifers. Leucoplasts contain droplets of lipid-like material at their margins leading to the belief that these organelles are involved in monoterpene synthesis. Leucoplasts contain enzymes of the monoterpene pathway, thus they might be involved in monoterpene synthesis.

Multiple choice
  1. Chromoplasts

  2. Leucoplasts

  3. Etioplasts

  4. Gerontoplasts

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

Etioplasts are the chloroplasts that have not been exposed to light. They are usually found in flowering plants (Angiosperms) grown in the dark or if a plant is kept out of light for several days.

Multiple choice
  1. Chloroplasts

  2. Chromoplasts

  3. Leucoplasts

  4. Gerontoplasts

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

Chromoplasts serve as attractants and identifiers. They are responsible for distinctive colours of flowers and fruits and thus, serve as attractants for pollination and identifiers for several plants.

Multiple choice
  1. Fats

  2. Minerals

  3. Proteins

  4. Carbohydrates

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

Photosynthesis produces glucose (a simple carbohydrate) as its primary product, using sunlight, water, and CO2. The glucose can be used immediately for energy, stored as starch, or converted to other carbohydrates like cellulose. While plants can synthesize fats, proteins, and absorb minerals, these are NOT direct products of photosynthesis. The overall reaction is: 6CO2 + 6H2O + light → C6H12O6 (glucose) + 6O2.

Multiple choice
  1. Mushroom

  2. Algae

  3. Amoeba

  4. Plasmodium

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

Algae are photosynthetic organisms that contain chlorophyll and produce their own food using sunlight. Mushrooms are fungi, while amoeba and plasmodium are non-photosynthetic protists.

Multiple choice
  1. glyoxylate, glycolate, serine, glycine

  2. serine, glyoxylate, glycine, glycolate

  3. glycine, serine, glycolate, glyoxylate

  4. glycolate, glyoxylate, glycine, serine

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

The right sequence in which such products emerge from ribulose bisphosphate in the photorespiration pathway, is Glycolate, glyoxylate, glycine, serine.

Multiple choice
  1. Thylakoid membrane

  2. Intrathylakoid space

  3. Stroma

  4. Chloroplast envelop

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

Thylakoid membrane is the actual site for Photochemical is the photosynthesis’s primary reaction which occurs in chloroplast. It is done by a series of electron carriers with phosphorylation of ADP to ATP. Thylakoid membrane is the membrane-bound region inside the chloroplast and Cyanobacteria.

Multiple choice
  1. Bacteriochlorophyll; no O2 evolution; light absorption at greater wavelength than 700nm.

  2. Chlorophyll a and c; O2 evolution; light absorption at greater wavelength than 700nm.

  3. Bacteriochlorophyll; no O2 evolution; light absorption at shorter wavelength than 700nm.

  4. Chlorophyll a; no O2 evolution; light absorption at the wavelengths between 400-500nm.

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

Bacteriochlorophyll; no O2 evolution; light absorption at greater wavelength than 700nm is appropriate to the bacterial photosynthesis.

Multiple choice
  1. In C4 plants when CO2 concentration is more than that of oxygen.

  2. In C3 plants when CO2 concentration is more than that of oxygen.

  3. In C3 plants when O2 concentration is more than that of CO2.

  4. In C4 plants when O2 concentration is more than that of CO2.

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

In C3 plants when O2 concentration is more than that of  CO2, glycolic acid would be produced. RuBisCO is involved in 1st major steps of carbon fixation,  in which CO2 is transformed into energy-rich molecules like glucose by plants.

Multiple choice
  1. The compensation points in such two plants are different.

  2. The two carboxylising enzymes in these two plants are different.

  3. Fixation of CO2 in the C4 plants is isolated by space where in CAM plants it is isolated by time.

  4. Two pathways of CO2 fixation vary in the two plants.

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

C4 plants possess 2 individual cells- mesophyll cells and bundle sheath cells. Difference between C4  and CAM plants is CAM plants have only one cell and  they open their stomata during night and close during day. Fixation of CO2 in the C4 plants is isolated by space where in CAM plants it isisolated by time.