Identify the correct statement on 'inhibin':
| 1. | Is produced by granulosa cells in the ovary and inhibits the secretion of FSH |
| 2. | Is produced by granulosa cells in the ovary and inhibits the secretion of LH |
| 3. | Is produced by nurse cells in the testes and inhibits the secretion of LH |
| 4. | Inhibits the secretion of LH, FSH and prolactin. |
Subtopic: Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |
Level 3: 35%-60%
NEET - 2016
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The difference between spermiogenesis and spermiation is?
| 1. | In spermiogenesis, spermatids are formed, while in spermiation, spermatozoa are formed. |
| 2. | In spermiogenesis, spermatozoa are formed, while in spermiation, spermatids are formed. |
| 3. | In spermiogenesis, spermatozoa from Sertoli cells are released into the cavity of seminiferous tubules, while in spermiation, spermatozoa are formed. |
| 4. | In spermiogenesis, spermatozoa are formed, while in spermiation, spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules. |
Subtopic: Spermiogenesis/Sperm Structure/Hormonal Regulation |
76%
Level 2: 60%+
NEET - 2018
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Extrusion of the second polar body from the egg nucleus occurs:
| 1. | simultaneously with the first cleavage |
| 2. | after entry of sperm but before fertilization |
| 3. | after fertilization |
| 4. | before entry of sperm into the ovum |
Subtopic: Fertilization: Part 1 | Fertilization |
71%
Level 2: 60%+
NEET - 2019
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Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?
1. High concentration of Progesterone
2. Low concentration of LH
3. Low concentration of FSH
4. High concentration of estrogen
Subtopic: Menstrual Cycle: Pre Ovulatory Phase |
70%
Level 2: 60%+
NEET - 2020
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In context of amniocentesis, which of the following statements is incorrect?
| 1. | it is used for prenatal sex determination |
| 2. | it can be used for detection of Down's syndrome |
| 3. | it can be used for detection of cleft palate |
| 4. | it is usually done when a woman is between 14-16 weeks pregnant. |
Subtopic: Introduction |
59%
Level 3: 35%-60%
NEET - 2016
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Match the following sexually transmitted diseases (Column-I) with their causative agent (Column-II) and select the correct option:
1. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
2. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
4. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
| Column-I | Column-II | ||
| (a) | Gonorrhea | (i) | HIV |
| (b) | Syphilis | (ii) | Neisseria |
| (c) | Genital Warts | (iii) | Treponema |
| (d) | AIDS | (iv) | Human Papilloma-Virus |
1. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
2. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
4. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
Subtopic: Sexually Transmitted Infections |
77%
Level 2: 60%+
NEET - 2017
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Following are the two statements regarding the origin of life:
Of the above statements, which one of the following options is correct?
| I: | The earliest organisms that appeared on the earth were non-green and presumably anaerobes. |
| II: | The first autotrophic organisms were the chemoautotrophs that never released oxygen. |
1. II is correct but I is false
2. Both I and II are correct
3. Both I and II are false
4. I is correct but II is false
2. Both I and II are correct
3. Both I and II are false
4. I is correct but II is false
Subtopic: Origin of Life: Chemical Evolution: 2 | Origin of Life |
75%
Level 2: 60%+
NEET - 2016
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Artificial selection to obtain cows yielding higher milk output represents:
| 1. | Directional, as it pushes the mean of the character in one direction |
| 2. | Disruptive, as it splits the population into two, one yielding higher output and the other lower output |
| 3. | Stabilizing followed by disruptive, as it stabilizes the population to produce higher-yielding cows |
| 4. | Stabilizing selection, as it stabilizes this character in the population |
Subtopic: Natural Selection |
58%
Level 3: 35%-60%
NEET - 2017
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A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
| 1. | 0.16 (AA); 0.36 (Aa); 0.48 (aa) |
| 2. | 0.36 (AA); 0.48 (Aa); 0.16 (aa) |
| 3. | 0.16 (AA); 0.24 (Aa); 0.36 (aa) |
| 4. | 0.16 (AA); 0.48 (Aa); 0.36 (aa) |
Subtopic: Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 | Hardy Weinberg Law |
65%
Level 2: 60%+
NEET - 2019
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The phenomenon of the evolution of different species in a given geographical area starting from a point and spreading to other habitats is called:
| 1. | Saltation | 2. | Co-evolution |
| 3. | Natural selection | 4. | Adaptive radiation |
Subtopic: Concept of Organic Evolution: Evidence: 2 |
85%
Level 1: 80%+
NEET - 2020
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