Photosynthesis in Higher Plants - Online Test
Q1. Chloroplast stroma contains
Answer : Option D
Explaination / Solution:
Chloroplast contains stroma and grana. Stroma are involved in light independent reaction enzymes for synthesis of glucose molecules using proudcut of light reaction.
Q2. Carbon dioxide is fixed in
Answer : Option B
Explaination / Solution:
Photosynthesis occurs in two steps- light reaction and dark reaction. During light reaction ATP and NADPH molecules are formed and in dark reaction carbon dioxide is fixed.
Q3. Scientist awarded noble prize in 1960 for tracing the path of carbon is
Answer : Option A
Explaination / Solution:
Melvin Calvin awarded noble prize in 1960 for tracing the path of carbon during photosynthesis. The cycle of event is named after him as Calvin cycle.
Q4. Photorespiration in plants begins from
Answer : Option B
Explaination / Solution:
Photorespiration in C3 plants start with Phosphoglycolate as primary acceptor in presence of RUBP enzyme to form a two carbon compound and a three carbon compound.
Q5. plants respond to higher concentration leads to
Answer : Option A
Explaination / Solution:
The fact that plants respond to higher concentration byshowing increased rates of photosynthesis leading to higher productivity .They are allowed to grow in carbon dioxide enriched atmosphere that leads to higher yields.
Q6. In pathway, the bundle sheath cells are lack of an enzyme called
Answer : Option B
Explaination / Solution:
The released in the bundle sheath cells enters the or the Calvin pathway, a pathway common to all plants. The bundle sheath cells are rich in an enzyme Ribulose bisphosphate carboxylase-oxygenase (RuBisCO), but lack PEPcase.
Q7. In photosynthesis photolysis of water is used in
Answer : Option D
Explaination / Solution:
Breaking down of water molecules in presence of sunlight during photosynthesis is called photolysis of water. During photolysis of water reduction of NADP+ into NADPH takes place.
Q8. Who proved that oxygen evolved in photosynthesis comes from water?
Answer : Option C
Explaination / Solution:
Ruben, Hassid and Kamen proved that Oxygen evolved during photosynthesis comes from water and not from carbon dioxide. For this, they used water with heavy isotope of oxygen, 18O.
Q9. First transitory biochemical produced in reaction between and RuBP is
Answer : Option A
Explaination / Solution:
First intermediate product produced in cycle of photosynthesis in presence of RUBP enzyme is 2-carboxy 3-keto 1,5-biphosphoribotol which change into two molecules of PGA.
Q10. The number of Oxygen molecules released per photon or quantum of light is called
Answer : Option A
Explaination / Solution:
Quantum yield is the number of Oxygen molecules released per photon or quantum of light. During light reaction of photosynthesis oxygen molecules are release during photolysis.
