Explore topic-wise InterviewSolutions in .

The correct answer is (b) False

Easiest explanation: During the nighttime, the plants TAKE up CO2 and convert it into ORGANIC acids CALLED as acidification. While in daytime, they utilize the organic acids to form CO2 back KNOWN as deacidification.

The correct option is (b) PYRUVATE orthophosphate dikinase

Easiest explanation: This reaction is the first step in the Hatch – Slack PATHWAY. The enzyme pyruvate orthophosphate dikinase is used to CONVERT pyruvate to PHOSPHOENOLPYRUVATE along with ATP.

The correct choice is (B) Experiments UPON Vegetables

Best explanation: JAN Ingenhousz in the year 1779 carried out around 500 experiments to prove the MECHANISM of photosynthesis. He observed that plants absorb carbon DI oxide and evolve oxygen with the help of light energy.

Correct answer is (d) Konstantin Mereschkowski

To explain: Chloroplast are small cell organelles found in both EUKARYOTIC and some prokaryotic photosynthetic organisms. They were FIRST DISCOVERED by Konstantin Mereschkowski in 1905.

The correct option is (c) Vacuoles

The best EXPLANATION: The CO2 is converted to malate, a four carbon ORGANIC compound. This is STORED in the vacuoles where it is later transported to the CHLOROPLAST for conversion of malate to CO2 for photosynthesis.

Correct answer is (C) 3.5

To explain I would SAY: For one milligram of CHLOROPLAST 3.5 micromoles of CO2 is FIXED in an hour. This reaction is ALSO known as the “dark reaction”.

Correct option is (b) RuBP

Easy explanation: RuBP is ribulose 1, 5-bisphosphate, a 5 CARBON compound. RuBP is INVOLVED in the carbon fixation. RuBP is regenerated from Ru5P by phosphorylation and it RENTERS the CYCLE through HMP shunt.

The CORRECT CHOICE is (d) Tyrosine

The explanation: Plastoquinone is a branched chain UNSATURATED quinone, which HELPS in the ELECTRON transport chain of photosynthesis. P-hydroxyphenylpyruvate is synthesized from tyrosine which then converts finally to plastoquinone.

The correct option is (a) Chlorophyll a

Easiest explanation: Chlorophyll a is the pigment, which primarily helps in PHOTOSYNTHESIS. XANTHOPHYLL and Anthocyanin are the PIGMENTS responsible for yellow and blue COLOUR in plants respectively.

Correct ANSWER is (c) 30 ATP and 12 NADPH2

Easy explanation: The CAM PATHWAY uses 30 ATP and 12 NADPH2 for synthesis of ONE glucose MOLECULE. This is higher than the energy REQUIREMENTS of C4 and C3 cycles.

The CORRECT choice is (c) CP12

The explanation is: The REDOX regulated protein CP12 controls the carbon fixation on Calvin cycle. It consists of 80 amino ACIDS and it is found in most of the PHOTOSYNTHETIC organisms.

The correct choice is (c) Wheat

Explanation: C3 plants use RUBISCO as a reducing agent to FIX atmospheric CARBON dioxide. C3 plants are the most common among the plant KINGDOM and include plants like cereals such as BARLEY, oats, rice and tubers like potato and sugar beet.

The CORRECT answer is (a) True

To elaborate: When there is a high intensity of light, the photosynthesis INHIBITION happens due to the block in the electron transport CHAIN. This is known as photo inhibition. This photosynthetic capacity is reduced, which in TURN reduces the NORMAL metabolism of all plants.

The correct answer is (a) 680NM

Best EXPLANATION: Photosystem II PRIMARY donor or P680 is a complex of many pigments which has the potentiality to absorb maximum light at 680nm. It is also known to be the strongest biological oxidizing agent.

The correct answer is (C) Addition of phosphate with light

The best explanation: Photophosphorylation is the process done by plants and some photosynthetic microbes by which they CONVERT ADP to ATP by addition of a phosphate group with the HELP of ENERGY from light. This process is further divided into two types:Cyclic and Non-Cyclic.

The CORRECT choice is (b) C55H72MgN4O5

To explain: The chlorophyll a contains a magnesium ION complex, which forms a ring structure called the Chlorin ring. It has a molar MASS of 893.51 g•mol^−1.

Correct ANSWER is (B) A – Thylakoids; B – Lumen

For explanation I would say: Thylakoids resemble the STRUCTURE of a coin, a STACK of thylakoids looks LIKE a stack of coins known as grana. The lumen is a connection between two or more grana.

Correct choice is (c) 80 – 130 million DALTONS

To elaborate: The CHLOROPLASTS have their own DNA, which is circular in shape that forms a ring like structure. A SINGLE CHLOROPLAST DNA has a MASS of about 80 – 130 million daltons.

The CORRECT answer is (a) Hatch and Slack

Explanation: Hatch and Slack discovered the C4 PATHWAY in the year 1966. It is also CALLED a Hatch – Slack pathway. The pathway produces four carbon sugar molecules.

The CORRECT option is (b) False

The explanation is: Photophosphorylation CONTAINS only PHOTOSYSTEM I. Because there is only a transfer of electrons, but there’s no reduction of NADP+.

The correct option is (B) MAGNESIUM

To EXPLAIN I would say: In myoglobin and hemoglobin the porphyrins CONTAIN iron (heme groups) whereas porphyrins present in chlorophyll contain magnesium ATOM.