Tag: pigments

Quizzes (1) Questions (36)

Questions Related to pigments

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

In which one of the following sets of plants is the endosperm chlorophyll us?

  1. Rosa, Prunus

  2. Crinum, Raphanus

  3. Arachis, Cicer

  4. Linum, Olea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In some plants, the endosperm contains chlorophyll and is photosynthetic. Examples include species like Rosa and Prunus.

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

Which of these is a type of phycobilin pigments?

  1. Phycocyanin

  2. Allophycocyanin

  3. Phycoerythrin

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

Phycobilins are open tetrapyrroles which neither contain magnesium nor phytol. Phycobilins are water soluble. The pigments are of two types-blue (phycocyanin, allophycocyanin) and red (phycoerythrin). The pigments are useful in chromatic adaptations. They are important accessory pigments of blue-green algae, cryptomonas and red algae. 

so the correct answer is 'All of the above'.

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

Consider the following pigments.
a. Chlorophyll a
b. Chlorophyll b
c. Chlorophyll c
d. Carotenes
e. Biliproteins
f. Xanthophylls
The characteristic photosynthetic pigments present in chlorophyceae would include.

  1. $1, 2, 3$ and $4$
  2. $1, 3, 4$ and $5$
  3. $2, 3, 5$ and $6$
  4. $1, 2, 4$ and $6$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chlorophyceae (green algae) typically contain chlorophyll a, chlorophyll b, carotenes, and xanthophylls.

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

Energy transfer in photosynthesis occurs as

  1. Phycoerythrin$\rightarrow $Phycocyanin$\rightarrow $Carotenoid$\rightarrow $Chlorophyll a
  2. Chlorophyll b$\rightarrow $Carotenoid$\rightarrow $Phycoerthrin$\rightarrow $Chlorophyll a
  3. Phycocyanin$\rightarrow $Phycoerythrin$\rightarrow $Cartenoid$\rightarrow $Chlorophyll a
  4. Chlorophyll$\rightarrow $Cartenoid$\rightarrow $Phycocyanin$\rightarrow $Chlorophyll a
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During photosynthesis, light energy is captured by accessory pigments and transferred efficiently toward the reaction center chlorophyll a. The correct energy transfer sequence is phycoerythrin to phycocyanin to carotenoids to chlorophyll a.

Multiple choice botany photosynthesis types of chlorophyll pigments photosynthetic pigments

Major Pigments in Phaeophycae :

  1. Chlorophyll $a$
  2. Chlorophyll $c$

  3. Fucoxanthin

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

Phaeophyceae, or brown algae, contain chlorophyll a, chlorophyll c, and carotenoids such as fucoxanthin, which give them their characteristic brown color. Since all the listed pigments are indeed found in brown algae, the correct choice is that all of the above are major pigments.

Multiple choice biology photosynthesis in higher plants types of chlorophyll pigments photosynthetic pigments

Which of the below statements is/are not correct regarding chlorophyll a molecule?

(i) Molecule formula of chl a is $C _{55}H _{72}O _5N _4Mg$
(ii) It is the primary photosynthetic pigment.
(iii) In the pure state, it is red in colour and thus it absorbs more blue wavelength of light than the red wavelength. 
(iv)It is a soluble in water as well as petroleum ether.

  1. (i) and (iii)

  2. (iii) and (iv)

  3. (ii) only

  4. (iv) only
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chlorophyll a is the primary photosynthetic pigment, which is bluish green in the pure state. It has an empirical formula $C _{55}H _{72}O _5N _4Mg$and molecular weight of $893$. It absorbs more red wavelength of light than violet blue . It is soluble in a number of organic solvents such as petroleum ether. 

So, the correct answer is ' In the pure state, it is red in colour and thus it absorbs more blue wavelength of light than the red wavelength and It is a soluble in water as well as petroleum ether'.

Multiple choice biology photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

How many of the given structures are associated with the thylakoid membrane?
PS II, RuBisCO, LHC, PEPcase, $F _0$ of ATP synthase, cytochromes b & f.

  1. $2$
  2. $3$
  3. $4$
  4. $5$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The structures associated with the thylakoid membrane are PS II, LHC, F0 of ATP synthase, and cytochromes b & f. RuBisCO is found in the stroma, and PEPcase is found in the cytoplasm of mesophyll cells, making a total of 4 structures.

Multiple choice biology photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

Read the following statements.
i) Chloroplasts get aligned with their flat surface parallel to the cell walls to receive optimum light intensity.
ii) Water is the only electron donor in all photosynthetic organisms.
iii) ATP and NADPH are utilised in Carboxylation stage of Calvin cycle.
iv) Bundle sheath cells are characterized by having a large number of chloroplasts and impervious walls.
v) Law of limiting factors was proposed by Blackmann.
Which of the given statements are CORRECT?

  1. (i), (iii) and (iv)

  2. (i), (ii) and (iii)

  3. (iii), (iv) and (v)

  4. (v) only
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology nutrition - food supplying system site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

Which cellular part is correctly described

  1. Thylakoids - Flattened membranous sacs forming grana

  2. Centrioles - Sites for active RNA synthesis

  3. Ribosomes - Those in chloroplasts are larger (80 S) while those in cytoplasm are smaller (70 S)

  4. Lysosomes - Opimally active at 8.5 pH.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Thylakoids are indeed flattened membranous sacs that stack to form grana. Centrioles are for spindle formation, not RNA synthesis. Chloroplast ribosomes are 70S, not 80S. Lysosomes are acidic (pH 5).

Multiple choice biology photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

The spaces inside the folds of ER membrane are known as

  1. Thylakoids

  2. Cisternae

  3. Mesosomes

  4. Periplasmic space
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The internal flattened sac-like compartments or spaces formed by the folds of the endoplasmic reticulum membrane are known as cisternae. Thylakoids belong to chloroplasts, and mesosomes are infoldings of the plasma membrane in bacteria.