Tag: photosynthetic pigments

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Multiple choice biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

Enzymes required for photophosphorylation are located in ............ of chloroplast.

  1. Peristromium

  2. Plastidome

  3. Stroma

  4. Quantasome
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A) The peristomium is the first true body segment in an annelid worm's body in the anterior end.

B) Plastid or plastidome refers to the entire unit where photosynthesis takes place.
C) Enzymes that are responsible for photophosphorylation are not present in the stroma.
D) Quantasomes are particles found in the thylakoid membrane of chloroplasts in which photosynthesis takes place. They are embedded in the surface of thylakoid discs in chloroplasts. They are composed of lipids and proteins that include various photosynthetic pigments and redox carriers. For this reason, they are considered to be photosynthetic units. They occur in 2 sizes: the smaller quantasome is thought to represent the site of photosystem I, the larger to represent the site of photosystem II which are involved in photophosphorylation. 
So the correct answer is 'Quantasome'.

Multiple choice biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

Quantasome is a unit related to

  1. Respiration

  2. Ascent of sap

  3. Growth

  4. Photosynthesis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A) Quantasomes are not involved in respiration.
B) Xylem is involved in the ascent of sap. Quantasomes do not play a part in the ascent of sap.

C) Quantasomes are involved in photosynthesis. They do not directly contribute to growth.
D) Quantasomes are particles found on the inner thylakoid membrane of chloroplasts in which photosynthesis takes place.
So the correct answer is 'Photosynthesis'.

Multiple choice biology protectors of biosphere structure of chloroplast plastids photosynthetic pigments

On what basis, paper chromatography separates plant pigments?

  1. The non - polarity of the solvents and pigments

  2. The polarity of the paper

  3. The polarity of the pigments

  4. All of the above

  5. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Paper chromatography is a technique that is used in the laboratories to separate plant pigments. The concept used is that this helps to separate the mixture into its component molecules. The molecules migrate, or move up the paper, at different rates because of differences in solubility, molecular mass, and hydrogen bonding with the paper.