Dark Reaction_MCQ_Basic Level

Dark Reaction - Basic

Dear Readers,

The dark reaction of photosynthesis is not dependent on sunlight but it does not mean it does not occur in its presence. The dark reaction occurs both in the presence and absence of sunlight. This reaction occurs in the stroma of the chloroplasts which are cell organelles known as the kitchen of the cells.

Q1.  The plants growing in dark show yellowing in leaves and elongated internodes, this condition is called as

•  Etiolation
•  Chlorosis
•  Dechlorosis
•  Dark Effect

Etiolation

Q2.  Dark reaction of photosynthesis is called

•  Aphotic action
•  Black action
•  Blackmann’s reaction
•  None of the above

Blackmann’s reaction

Q3. Ribulose phosphate is a

•  Aldose sugar
•  Ketose sugar
•  Disaccharide
•   Trisaccharide

Ketose sugar

Q4.  Which of the following is obtained from CO₂ during glucose manufacture

•   Oxygen
•   Carbon
•  Both (a) and (b)
•  None of the above

Both of (a) and (b)

Q5. Which of the enzyme is involved in the conversion of 3PGA to 3PGAL

•  Triose phosphate dehydrogenase
•  Carboxydismutase
•  Phosphatase
•  Aldolase

Triose phosphate dehydrogenase

Q6.  The number of carbon atoms is five in

•  Xylulose
•   Ribose
•   Ribulose
•  All of the above

All of the above

Q7.  Sedohaptulose is a carbohydrate having

•   3 carbon atoms
•   2 carbon atoms
•  4 carbon atoms
•  7 carbon atoms

7 carbon atoms

Q8.  Which of the following required for conversion of 3PGAL and dihydroxy acetone phosphate to fructose 1, 6 diphosphate

•  Transketolase
•   Aldolase
•   Phosphatase
•   Hexokinase

Aldolase

Q9.  First stable product of Calvin cycle has

•  2 carbon atoms
•  3 carbon atoms
•  4 carbon atoms
•  6 carbon atoms

3 carbon atoms

Q10.  To form 1 molecular of glyceraldehyde phosphate in Calvin cycle

•   9 ATP and 9 NaOH are required
•   6 ATP and 6 NaOH are required
•  3 ATP and 3 NaOH are required
•   9 ATP and 6 NaOH are required

9 ATP and 9 NaOH are required