Tag: pigments

Quizzes (1) Questions (36)

Questions Related to pigments

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

Match the following

a. Bacteria 1. Synthesis and storage of lipids
b. Sphaerosomes 2. Idiogram
c. Chloroplasts 3. Glycocalyx
d. Karyotype 4. Thylakoids

  1. a-3, b-1, c-4, d-2

  2. a-3, b-1, c-2, d-4

  3. a-4, b-3, c-2, d-1

  4. a-1, b-2, c-3, d-4

  5. a-3, b-2, c-4, d-1.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bacteria have glycocalyx (a-3). Sphaerosomes are involved in lipid storage (b-1). Chloroplasts contain thylakoids (c-4). Karyotype is represented by an idiogram (d-2).

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

Consider the following processes.
a. $O _2$ evolution
b. $CO _2$ fixation
c. NADPH formation
d. Chlorophyll biosynthesis.
Which of these do not occur in thylakoids?

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

Oxygen evolution, NADPH formation, and light reactions occur in the thylakoids. CO2 fixation (Calvin cycle) occurs in the stroma, and chlorophyll biosynthesis involves multiple cellular compartments including plastids and cytoplasm, meaning 2 and 4 do not exclusively occur in thylakoids.

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

If $^{14}CO _2$ is added to a suspension of photosynthesizing chloroplasts, which of the following will be the first compound to be radioactive?

  1. ATP

  2. NADPH

  3. NADH
  4. $3$-phosphor glycerate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the Calvin cycle, CO2 is first fixed by RuBisCO to form 3-phosphoglycerate, which is the first stable radioactive compound.

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 one of the following options is true in photsynthesis.

  1. $CO _2$ is oxidized and $ H _2O $ is reduced
  2. $H _2O $is oxidized and $CO _2 is reduce d$
  3. Both $CO _2$ and $H _2O$ are reducedd
  4. Both $CO2$ and$ H2O$ are oxidized
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In photosynthesis, water is oxidized to release oxygen, and CO2 is reduced to form glucose.

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

With reference to photosynthesis in chloroplasts, consider the following statements.
a. The reactions that break down water and produce oxygen are located on the lumen side of the thylakoid membrane, in granum areas.
b. The molecules of ferredoxin-NADP re-educate that generate NADPH are located on the side of the membrane facing stroma.
Which of the statements given is/are correct?

  1. $1$ only
  2. $2$ only
  3. Both $1$ and $2$
  4. Neither $1$ nor $2$
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice biology nutrition - food supplying system site of photosynthesis chloroplast and pigments of photosynthesis pigments

Which of the following pairs are correctly matched? Principal wavelength Physiological of light event.
a. $700$nm- Photo system I
b. $650$nm- Photo system II
c. $690$nm- Photo system III
d. $620$nm- Phycocyanin
Select the correct answer using the codes given.

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

PS I absorbs at 700nm, PS II at 680nm (650nm is often associated with accessory pigments/PS II complex), and Phycocyanin absorbs around 620nm. PS III does not exist.

Multiple choice biology nutrition - food supplying system site of photosynthesis chloroplast and pigments of photosynthesis pigments

Match column I with column II and select the correct option from the given codes

 Sr. no  Column I  Sr.no Column II 
 A.  $C _4$ plant  i.  Succulents
 B.  Chlorophyll $b$  ii.  Accessory photosynthetic pigment
 C.  PS II  iii.  Photooxodation of $H _2O$
 D.  CAM  iv.  Kranz anatomy 

.


  1. A - (iv), B - (ii), C - (iii), D - (i)

  2. A - (iii), B - (ii), C - (iv), D - (i)

  3. A - (i), B - (iii), C - (ii), D - (iv)

  4. A - (i), B - (ii), C - (iii), D - (iv)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

(A) C$ _4$ plant - Kranz anatomy 

(B) Chlorophyll b - Succulents
(C) PS II - Photooxidation of water
(D) CAM - Accessory photosynthetic pigment
So, the correct answer is (a).

Multiple choice biology nutrition - food supplying system site of photosynthesis chloroplast and pigments of photosynthesis pigments

Following table summarises the differences between light reaction and dark reaction. 

Light reaction     Dark reaction      
i These arealso called as biosynthetic phase These are also calledas photochemicalphase
ii These reactionoccur over thylakoids. These reaction occur in stroma of chloroplasts.
iii These produce assimilatory power i.e.$NADPH _{2}$and ATP  These consume $NADPH _{2}$ and ATP.
iv  These are directiondependent uponlight. These depend upon the products synthesisedduring light reaction

Which of the above pairs of difference is/are incorrect?

  1. (i) and (iv)

  2. (iii) and (iv)

  3. (ii) only

  4. (i) only
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The light reaction is also called as photochemical phase whereas dark reaction is called as biosynthetic phase.

So the correct option is D.