Identify the correct statements:
Choose the correct answer from the options given below:
| A: | Lenticels are the lens-shaped openings permitting the exchange of gases. |
| B: | Bark formed early in the season is called hard bark. |
| C: | Bark is a technical term that refers to all tissues exterior to vascular cambium. |
| D: | Bark refers to periderm and secondary phloem. |
| E: | Phellogen is single- layered in thickness. |
| 1. | B and C only | 2. | B, C and E only |
| 3. | A and D only | 4. | A, B and D only |
Subtopic: Β Activity of Cork Cambium |
Β 66%
Level 2: 60%+
NEET - 2023
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Main steps in the formation of Recombinant DNA are given below. Arrange these steps in a correct sequence.
Choose the correct answer from the options given below:
| A. | Insertion of recombinant DNA into the host cell. |
| B. | Cutting of DNA at specific location by restriction enzyme. |
| C. | Isolation of desired DNA fragment. |
| D. | Amplification of gene of interest using PCR. |
| 1. | B, D, A, C | 2. | B, C, D, A |
| 3. | C, A, B, D | 4. | C, B, D, A |
Subtopic: Β Process of Biotech |
Level 3: 35%-60%
NEET - 2023
Hints
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements, choose the correct answer from the options given below:
| Assertion (A): | In gymnosperms, the pollen grains are released from the microsporangium and carried by air currents. |
| Reason (R): | Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed. |
| 1. | (A) is False, (R) is True. |
| 2. | Both (A) and (R) are True and (R) correctly explains (A). |
| 3. | Both (A) and (R) are True and (R) does not correctly explain (A). |
| 4. | (A) is True, (R) is False. |
Subtopic: Β Gymnosperms |
Β 69%
Level 2: 60%+
NEET - 2023
Hints
Which one of the following statements is not correct?
| 1. | The amount of some toxic substances of industrial wastewater increases in the organisms at successive trophic levels. |
| 2. | The micro-organisms involved in biodegradation of organic matter in a sewage-polluted water body consume aquatic organisms. |
| 3. | Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries. |
| 4. | Water hyacinth grows abundantly in eutrophic water bodies and lead to an imbalance in the ecosystem dynamics of the water body. |
Subtopic: Β Water Pollution |
Β 63%
Level 2: 60%+
NEET - 2023
Hints
Which of the following statements are correct about Klinefelter's Syndrome?
Choose the correct answer from the options given below:
| A. | This disorder was first described by Langdon Down (1866). |
| B. | Such an individual has overall masculine development. However, the feminine development is also expressed. |
| C. | The affected individual is short statured. |
| D. | Physical, psychomotor and mental development is retarded. |
| E. | Such individuals are sterile. |
| 1. | A and E only | 2. | A and B only |
| 3. | C and D only | 4. | B and E only |
Subtopic: Β Non - Disjunction & Aneuploidy |Β Sex Aneuploidy - Turner & Klinefelter Syndrome |
Β 83%
Level 1: 80%+
NEET - 2023
Hints
Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements, choose the correct answer from the options given below:
| Assertion (A): | A flower is defined as a modified shoot wherein the shoot apical meristem changes to floral meristem. |
| Reason (R): | Internode of the shoot gets condensed to produce different floral appendages laterally at successive nodes instead of leaves. |
| 1. | (A) is False but (R) is True. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Β Inflorescence |
Β 68%
Level 2: 60%+
NEET - 2023
Hints
Match List I with List II:
| List I | List II | ||
| A. | M Phase | I. | Proteins are synthesized |
| B. | G2 Phase | II. | Inactive phase |
| C. | Quiescent stage | III. | Interval between mitosis and initiation of DNA replication |
| D. | G1 Phase | IV. | Equational division |
Choose the correct answer from the options given below:
| Options: | A | B | C | D |
| 1. | II | IV | I | III |
| 2. | III | II | IV | I |
| 3. | IV | II | I | III |
| 4. | IV | I | II | III |
Subtopic: Β Intro to Cell Cycle & Interphase |
Β 90%
Level 1: 80%+
NEET - 2023
Hints
Malonate inhibits the growth of pathogenic bacteria by inhibiting the activity of:
| 1. | Dinitrogenase | 2. | Succinic dehydrogenase |
| 3. | Amylase | 4. | Lipase |
Subtopic: Β Enzyme Inhibition |
Β 91%
Level 1: 80%+
NEET - 2023
Hints
Which of the following combinations is required for chemiosmosis?
| 1. | Proton pump, electron gradient, NADP synthase. |
| 2. | Membrane, proton pump, proton gradient, ATP synthase. |
| 3. | Membrane, proton pump, proton gradient, NADP synthase |
| 4. | Proton pump, electron gradient, ATP synthase |
Subtopic: Β Chemiosmotic hypothesis |
Β 80%
Level 1: 80%+
NEET - 2023
Hints
Match List I with List II:
Choose the correct answer from the options given below:
| List I | List II | ||
| A. | Cohesion | I. | More attraction in liquid phase |
| B. | Adhesion | II. | Mutual attraction among water molecules |
| C. | Surface tension | III. | Water loss in liquid phase |
| D. | Guttation | IV. | Attraction towards polar surfaces |
| Options: | A | B | C | D |
| 1. | II | I | IV | III |
| 2. | II | IV | I | III |
| 3. | IV | III | II | I |
| 4. | III | I | IV | II |
Subtopic: Β Transpiration & Guttation |
Β 57%
Level 3: 35%-60%
NEET - 2023
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