NEET Exam  >  NEET Tests  >  Biology Class 11  >  Test: What is Photosynthesis? - NEET MCQ

Test: What is Photosynthesis? - NEET MCQ


Test Description

15 Questions MCQ Test Biology Class 11 - Test: What is Photosynthesis?

Test: What is Photosynthesis? for NEET 2024 is part of Biology Class 11 preparation. The Test: What is Photosynthesis? questions and answers have been prepared according to the NEET exam syllabus.The Test: What is Photosynthesis? MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: What is Photosynthesis? below.
Solutions of Test: What is Photosynthesis? questions in English are available as part of our Biology Class 11 for NEET & Test: What is Photosynthesis? solutions in Hindi for Biology Class 11 course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Test: What is Photosynthesis? | 15 questions in 15 minutes | Mock test for NEET preparation | Free important questions MCQ to study Biology Class 11 for NEET Exam | Download free PDF with solutions
Test: What is Photosynthesis? - Question 1

The synthesis of complex organic substances from simple inorganic raw materials in the presence of sunlight and chlorophyll is called ..........., which is a ............ process.

Detailed Solution for Test: What is Photosynthesis? - Question 1

Photosynthesis is an enzyme regulated anabolic process which involves the synthesis of organic compounds, inside the chlorophyll containing cells, from CO2 and H2O with the help of sunlight as a source of energy. Oxygen evolved during photosynthesis comes from water. The equation for photosynthesis can be summarised as follows.

Test: What is Photosynthesis? - Question 2

Visible part of electromagnetic spectrum consists of radiations having a wavelength in the range of

Detailed Solution for Test: What is Photosynthesis? - Question 2

Light is the visible part of electomagnetic radiations. Visible light consists of radiations having a wavelength between 390-760 nm (or 399-430nm), blue of indigo (430-470nm), blue green or blue (470-500nm), green (500-580nm), yellow (580-600nm), orange (600-650nm), orange red (650-600nm) and red (660-760nm).

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: What is Photosynthesis? - Question 3

Which reaction in the Calvin cycle is catalysed by the enzyme RuBP carboxylase which results in the formation of two molecules of 3-PGA?

Detailed Solution for Test: What is Photosynthesis? - Question 3
  • Carboxylation is the fixation of CO2 into a stable organic intermediate.
  • Carboxylation is the most crucial step of the Calvin cycle where CO2 is utilised for the carboxylation of RuBP.
  • This reaction is catalysed by the enzyme RuBP carboxylase which results in the formation of two molecules of 3-PGA.
  • Since this enzyme also has an oxygenation activity, it would be more correct to call it RuBP carboxylase-oxygenase or RuBisCO.
Test: What is Photosynthesis? - Question 4

In purple sulphur bacterial photosynthesis, ________.

Detailed Solution for Test: What is Photosynthesis? - Question 4
  • Chromatiaceae is a family of purple sulphur bacteria, e.g. Chromatium.
  • These are short, Gram-negative rods, ~1 µm in diameter and 3-4 µm long.
  • They are able to use sulphur and sulphide as the sole photosynthetic electron donor and sulphur can be oxidised to sulphate.
  • These bacteria use an inorganic sulphur compound, such as hydrogen sulphide, as an electron donor.
Test: What is Photosynthesis? - Question 5

Which of the following statements are true about photosynthesis?

A. In this process, solar energy is converted into chemical energy.
B. In photosynthesis, CO2 and H2O are used.
C. In photosynthesis, CO2 is released and O2 is consumed.
D. In photosynthesis, O2 is released and carbon monoxide is consumed.

Detailed Solution for Test: What is Photosynthesis? - Question 5

Both statements (A) and (B) are correct about photosynthesis reaction.
A. In this process, solar energy is converted into chemical energy.
B. In photosynthesis, CO2 and H2O are used to give glucose and oxygen in the presence of sunlight with the help of green pigment chlorophyll.

Test: What is Photosynthesis? - Question 6

Which one of the following equations suggests that O2​ released during photosynthesis comes from water?

Detailed Solution for Test: What is Photosynthesis? - Question 6

Ruben and Kamen (1941), while working on chlorella (unicellular green alga ) found that oxygen liberated during photosynthesis comes from water. 

(i) When normal H2​O radioactive CO2​(i.e.CO218​) were used, normal O2​ is evolved. 

(ii) When normal CO2​ radioactive H2​O(i.e.H2​O18) were used, radioactive O2​ (i.e.O218​) is evolved. 

nCO2​+nH2​O18→(CH2​O)n​+O218​↑ (radioactive oxygen)+H2​O 

So the correct option is 'D'.

Test: What is Photosynthesis? - Question 7

During photochemical reactions of photosynthesis,

Detailed Solution for Test: What is Photosynthesis? - Question 7

Light reactions or the 'photochemical' phase include light absorption, water splitting, and oxygen release. The splitting of water is associated with the PS II - water is split into H+, [O] and electrons. This creates oxygen, one of the net products of photosynthesis and the formation of high-energy chemical intermediates, ATP and NADPH2. The light reactions capture energy from sunlight, which they change to chemical energy that is stored in molecules of NADPH2 and ATP.

Test: What is Photosynthesis? - Question 8

In comparison to C3 cycle, the number of extra ATP molecules required in C4 cycle is

Detailed Solution for Test: What is Photosynthesis? - Question 8

It takes 12 more ATPs than Ccycle to replenish this PEP because additional 2 ATPs are needed for every CO2 molecule fixed.

Test: What is Photosynthesis? - Question 9

Who, after conducting experiments on purple and green sulfur bacteria, inferred that O2​ evolved during photosynthesis comes from H2​O not from CO2​?

Detailed Solution for Test: What is Photosynthesis? - Question 9

Van Niel (1897-1885), on the basic of his studies with puple and green sulphur bacteria, demonstrated that phoosynthesis is a light dependent reaction in which hydrogen from a oxidisable compound reduces CO2 to form sugar.

In green sulphur bacteria, when H2S instead of H2O was used as hydrogen donor, no O2 was evolved.

6CO2+12H2S→C6H12O6+6H2O+125

From the above observation and conclusions, van Niel proposed that oxygenic photosyntheis of all organisms is actually an oxidation-reduction reaction involving action of hydrogen of water over carbon dioxide to form organic ompounds. He also propounded that oxygen is evolved from water.

Test: What is Photosynthesis? - Question 10

Which of the below statements is/are not correct regarding chlorophyll a molecule?

(i) Molecule formula of chl a is C55​H72​O5​N4​Mg
(ii) It is the primary photosynthetic pigment.
(iii) In the pure state, it is red in colour and thus it absorbs more blue wavelength of light than the red wavelength. 
(iv) It is a soluble in water as well as petroleum ether.

Detailed Solution for Test: What is Photosynthesis? - Question 10

Chlorophyll a is the primary photosynthetic pigment, which is bluish green in the pure state. It has an empirical formula C55​H72​O5​N4​ Mgand molecular weight of 893. It absorbs more red wavelength of light than violet blue . It is soluble in a number of organic solvents such as petroleum ether. 

Test: What is Photosynthesis? - Question 11

Given graph represents the absorption spectra of three photosynthetic pigments, chl a chl b and β-carotene. 


Select the correct statement regarding this.

Detailed Solution for Test: What is Photosynthesis? - Question 11

The graphical curve showing the amount of energy of different wavelengths of light absorbed by a pgment is called absorption spectrum,. It is studies with the help of spectrophotometer. The absorption spectra of chorophylls a and b show that they absorb maximum light in the blue-violet and red wavelengths. The pgments are often known after the wvelength which is absorbed to the maximum e.g., chl a673 Chl a683(P680), Chl a703(P700).

Test: What is Photosynthesis? - Question 12

Accessory photosynthetic pigments in most green plants are 

Detailed Solution for Test: What is Photosynthesis? - Question 12

Chlorophyll a is found in almost all photosynthetic plants except bacteria. It is called primary photosynthetic pigment because it performs primary reactions of photosynthesis which involve conversion of light energy into chemical energy. Other photosynthetic pigments like chlorophyll b, xanthophylls and carotenes are called accessory pigments. They absorb light energy of different wavelengths, broaden the spectrum of light absorption and hand over the energy to chlorophyll a through electron spin resonance and also protect chlorophyll a from photo-oxidation.

Test: What is Photosynthesis? - Question 13

If green plant cells are incubated with O18- labeled water, which of the following will become radioactive when the cells are exposed to light.

Detailed Solution for Test: What is Photosynthesis? - Question 13

Test: What is Photosynthesis? - Question 14

The most abundant plant protein on the earth is

Detailed Solution for Test: What is Photosynthesis? - Question 14

The most abundant plant protein in the world is RuBisCo, which is an enzyme that catalyses the first step in carbon fixation. RuBisCo is found in plants, algae, cyanobacteria and certain other bacteria. It takes part in photosynthesis and converts inorganic CO2 into organic forms containing C-C bonds and H atoms.

Test: What is Photosynthesis? - Question 15

Chlorophyll in a leaf is required for

Detailed Solution for Test: What is Photosynthesis? - Question 15

Chlorophyll present in chloroplasts traps solar energy.

190 videos|388 docs|210 tests
Information about Test: What is Photosynthesis? Page
In this test you can find the Exam questions for Test: What is Photosynthesis? solved & explained in the simplest way possible. Besides giving Questions and answers for Test: What is Photosynthesis?, EduRev gives you an ample number of Online tests for practice

Up next

190 videos|388 docs|210 tests
Download as PDF

Up next