Which of the following hormones is responsible for both the milk ejection reflex and the foetal ejection reflex?

1. Estrogen 2. Prolactin
3. Oxytocin 4. Relaxin

Subtopic:  Prolactin & Posterior Pituitary |
 88%
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NEET - 2019
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The vapor of secondary alcohol passed over heated copper at 573 K yield:
 

1. A carboxylic acid 2. An aldehyde
3. A ketone 4. An alkene
Subtopic:  Alcohols: Preparation & Properties |
 79%
From NCERT
NEET - 2019
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No new follicles develop in the luteal phase of the menstrual cycle because :

1.  Follicles do not remain in the ovary after ovulation
2.  FSH levels are high in the luteal phase
3.  LH levels are high in the luteal phase
4.  Both FSH and LH levels are low in the luteal phase
Subtopic:  Menstrual Cycle: Luteal Phase |
 70%
From NCERT
NEET - 2019
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In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as :

1. Adaptive Radiation

2. Divergent Evolution

3. Cyclical Evolution

4. Convergent Evolution

Subtopic:  Theory of Evolution & Lamarckism | Concept of Organic Evolution: Evidence |
 63%
From NCERT
NEET - 2019
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Match the items of Column - I with Column - II :

Column-I

Column-II
(a) XX-XO method of sex determination (i) Turner's syndrome
(b) XX-XY method of sex Determination (ii) Female heterogametic
(c) Karyotype-45 (iii) Grasshopper
(d) ZW-ZZ method of Sex Determination (iv) Female homogametic

Select the correct option from the following:

(a) (b) (c) (d)
1. (ii) (iv) (i) (iii)
2. (i) (iv) (ii) (iii)
3. (iii) (iv) (i) (ii)
4. (iv) (ii) (i) (iii)
Subtopic:  Sex Determination | Sex Aneuploidy - Turner & Klinefelter Syndrome |
 79%
From NCERT
NEET - 2019
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What will be the sequence of mRNA produced by the following stretch of DNA?

3' ATGCATGCATGCATG 5' TEMPLATE STRAND

5' TACGTACGTACGTAC 3' CODING STRAND

1. 3' AUGCAUGCAUGCAUG 5'

2. 5' UACGUACGUACGUAC 3'

3. 3' UACGUACGUACGUAC 5'

4. 5' AUGCAUGCAUGCAUG 3'

Subtopic:  DNA Double Helix |
 70%
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Select the incorrect statement regarding inbreeding:

1. Inbreeding helps in elimination of deleterious alleles from the population
2. Inbreeding is necessary to evolve a pure-line in any animal
3. Continued inbreeding reduces fertility and leads to inbreeding depression.
4. Inbreeding depression cannot be overcome by out-crossing.

Subtopic:  Animal Husbandry (OLD NCERT) |
 87%
From NCERT
NEET - 2019
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For a biocontrol agent to be part of an integrated pest management, it should be:

1. species-specific and symbiotic

2. free living and broad spectrum

3. narrow spectrum and symbiotic

4. species-specific and inactive on non-target organisms

Subtopic:  Microbes in Biocontrol Agent |
 73%
From NCERT
NEET - 2019
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The major products C and D formed in the following reaction respectively are:
\(CH_3CH_2CH_2OC{(CH_3)}_3 \xrightarrow[\Delta]{\text{Excess}\ HI}\ C + D\)

1. H3C-CH2-CH2-I  and I-C(CH3)3

2. H3C-CH2-CH2-OH  and I-C(CH3)3

3. H3C-CH2-CH2-I  and HO-C(CH3)3

4. H3C-CH2-CH2-OH  and HO-C(CH3)3

Subtopic:  Ethers: Preparation & Properties, Uses |
From NCERT
NEET - 2019
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Match the following enzymes with their functions:

Column-I

Column-II

(a)

Restriction

endonuclease

(i)

joins the DNA fragments

(b)

Exonuclease

(ii)

extends primers on genomic DNA template

(c)

DNA ligase

(iii)

cuts DNA at a specific position

(d)

Tag polymerase

(iv)

removes nucleotides from the ends of DNA

Select the correct option from the following:

Options: (a) (b) (c) (d)
1. iii i iv ii
2. iii iv i ii
3. iv iii i ii
4. ii iv i iii

Subtopic:  Tools: Enzymes: I | Tools: Enzymes: II | Tools |
 90%
From NCERT
NEET - 2019
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