In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?

1. 25% 2. 100%
3. 50% 4. 75%
Subtopic:  Mendelian Disorders: Sickle Cell Anemia |
 57%
Level 3: 35%-60%
NEET - 2021
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Read the following statements.

(a) Metagenesis is observed in Helminths.
(b) Echinoderms are triploblastic and coelomate animals.
(c) Round worms have organ-system level of body organization.
(d) Comb plates present in ctenophores help in digestion.
(e) Water vascular system is characteristic of Echinoderms.

Choose the correct answer from the options given below:

1. (a), (d) and (e) are correct

2. (b), (c) and (e) are correct

3. (c), (d) and (e) are correct

4. (a), (b) and (c) are correct

Subtopic:  Phylum Coelenterata | Phylum Ctenophora | Phylum Aschelminthes | Phylum Echinodermata |
 80%
Level 1: 80%+
NEET - 2021
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Sphincter of Oddi is present at :
1. Gastro-oesophageal junction
2. Junction of jejunum and duodenum
3. Ileo-caecal junction
4. Junction of hepato-pancreatic duct and duodenum

Subtopic:  Accessory Digestive Glands |
 83%
Level 1: 80%+
NEET - 2021
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Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?

1. Epinephrine 2. Thrombokinase
3. Thrombin 4. Renin
Subtopic:  Blood: Blood Clotting |
 77%
Level 2: 60%+
NEET - 2021
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Which one of the following belongs to the family Muscidae?

1. Cockroach 2. House fly
3. Fire fly 4. Grasshopper
Subtopic:  Taxonomy 3: From Family to Classification of Some Organisms |
 94%
Level 1: 80%+
NEET - 2021
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The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of mitosis, if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after the S phase?
1. 4 2. 32
3. 8 4. 16
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 82%
Level 1: 80%+
NEET - 2021
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Which of the following is not an objective of Biofortification in crops?

1. Improve vitamin content 

2. Improve micronutrient and mineral content

3. Improve protein content

4. Improve resistance to diseases 

Subtopic:  Intro to Agri Applications |
 74%
Level 2: 60%+
NEET - 2021
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A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is:

1. Palindromic Nucleotide sequences 2. Poly(A) tail sequences
3. Degenerate primer sequence 4. Okazaki sequences
Subtopic:  Restriction Enzymes - Main Enzymes |
 93%
Level 1: 80%+
NEET - 2021
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Match List-I with List-II

List-I List-II
(a) Vaults (i) Entry of sperm through the Cervix is blocked
(b) IUDs (ii) Vas deferens is cut and tied
(c) Vasectomy (iii) Phagocytosis of sperms within the Uterus
(d) Tubectomy (iv) Fallopian tube is cut and tied

   
Choose the correct answer from the options given below:

(a) (b) (c) (d)
1. (ii) (iv) (iii) (i)
2. (iii) (i) (iv) (ii)
3. (iv) (ii) (i) (iii)
4. (i) (iii) (ii) (iv)
Subtopic:  Contraception: Barrier Methods & IUDs | Hormonal Contraceptives, Emergency Contraception & Terminal Methods |
 92%
Level 1: 80%+
NEET - 2021
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For effective treatment of the disease, early diagnosis and understanding of its pathophysiology is very important. Which of the following molecular diagnostic techniques is very useful for early detection?
1. ELISA Technique
2. Hybridization Technique
3. Western Blotting Technique
4. Southern Blotting Technique
Subtopic:  Molecular Diagnosis |
 89%
Level 1: 80%+
NEET - 2021
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