Tag: chloroplast and pigments of photosynthesis

Questions Related to chloroplast and pigments of photosynthesis

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?

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

  1. (i) and (iv)

  2. (iii) and (iv)

  3. (ii) only

  4. (i) only

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Correct Option: D
Explanation:

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

So the correct option is D.

Consider following statements A & B
A - The enzyme acts on 'N' terminal of polypeptide chain
B - The enzyme acts on 'C' terminal of a polypeptide chain
Choose the correct option w.r.t the digestive juices which contain these enzymes

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

  1. A- Succus entericus B - Pancreatic juice

  2. A - Intestinal juice B - Bile juice in duodenum

  3. A - Pancreatic juice B - Intestinal juice

  4. A - Intestinal juice B - Gastric juice

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Correct Option: A

Why does the total amount of $CO _2$ in the atmosphere remains constant even though respiration liberates $CO _2$?

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

  1. $CO _2$ acts as a buffer

  2. $CO _2$ is converted to carbohydrates in photosynthesis

  3. $CO _2$ forms carbonic acid

  4. $CO _2$ undergoes cleavage during photosynthesis.

Show answer
Correct Option: B
Explanation:
Most organisms release or exhale $CO _2$ during respiration. This $CO _2$  present in the environment is utilized by plants in the process of photosynthesis with the final product being a carbohydrate. This is how the amount of $CO _2$  in the atmosphere is kept under check.
So, the correct answer is '$CO _2$  is converted to carbohydrates in photosynthesis'.

Thylakoids are found in 

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

  1. bacteria

  2. blue green algae

  3. higher plants

  4. all of these

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Correct Option: A

In a plant cell chlorophyll is present in:

botany photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments

  1. Caraplasts

  2. Stroma

  3. Leucoplast

  4. Chloroplast

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Correct Option: D
Explanation:

the green coloured, chief photosynthetic pigment present in the chloroplasts of higher plants is called chlorophyll. It is found in algae, and higher plants.

So, the correct option is 'Chloroplasts'.

Minerals controlling synthesis of chlorophyll molecule ______________.

botany photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments

  1. $Ca$ and $K$

  2. $Fe$ and $Mg$

  3. $Mn$ and $K$

  4. $Ca$ and $Mg$

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Correct Option: A

Ginger-Muller counter is used for ________________.

botany photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments

  1. Estimating chlorophyll concentration

  2. Measuring radioactivity

  3. Identifying phytochrome pigments

  4. Measuring the light absorption by chlorophyll

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Correct Option: A