NEET TEST SERIES 161 BIOLOGY

1. Assertion: Hybrid is formed by cross between two organisms that are different in one or more than one traits.

    Reason: Mendel crossed two plants differing in one trait to obtain F₁ plants which is a monohybrid cross. In the light of the above statements, choose the correct answer from the options given below:

(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(b) (A) is correct but (R) is not correct
(c) (A) is not correct but (R) is correct
(d) Both (A) and (R) are correct and (R) is the correct explanation of (A)

2.   Statement I: DNA fingerprinting is very well known for its application in paternity testing in case of disputes.
     Statement II: It employs the principle of DNA polymorphism. In the light of the above statements, choose the correct answer from the options given below:

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrect
(c) Statement I is incorrect but Statement II is correct
(d) Both Statement 1 and Statement II are correct

6. Assertion: CO₂ diffuses only from tissue to alveoli and not in reverse direction.

    Reason: CO₂ is 10 times more soluble than O₂. In the light of the above statements, choose the correct answer from the options given below:

(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(b) (A) is correct but (R) is not correct
(c) (A) is not correct but (R) is correct
(d) Both (A) and (R) are correct and is the correct explanation of (A)

7. In which of the following option the partial pressure of oxygen or carbon-di-oxide is correctly described?

8. Golden rice is a transgenic crop of the future with the following improved trait:

(a) insect resistance            
(b) high lysine (essential amino acid) content
(c) high protein content
(d) high vitamin-A content

9. PCR and Restriction Fragment Length Polymorphism are the methods for:

(a) Study of enzymes
(b) Genetic transformation
(c) DNA sequencing           
(d) Genetic Fingerprinting

10. The enormous diversity of protein molecules is due mainly to the diversity of

(a) amino groups on the amino acids
(b) R groups on the amino acids
(c) amino acid sequences within the protein molecule
(d) peptide bonds

11. Members from how many given phylum possess external fertilization?
Hemichordata, Platyhelminthes, Ctenophora, Porifera, Echinodermata, Arthropoda

(a) 2
(b) 3
(c) 4 
(d) 6

12. Intercalated discs are the communication junctions between the cells of

(a) cardiac muscles             
(b) striped muscles
(c) adipose tissue
(d) nerve and striated muscles

13. In which of the phylum, excretory organ like proboscis gland is present?

(a) Hemichordata                
(b) Chordata
(c) Echinodermata               
(d) Annelida

14. Mesorchium in frogs is associated with:

(a) Testes 
(b) Kidney
(c) Brain
(d) Both(a)&(b)

15. The diaphragm, cervical cap and vaults are

(a) Disposable contraceptive devices
(b) Reusable contraceptives
(c) IUDs
(d) Implants

16. Select the correct statements regarding oogenesis.
(i) It is initiated during the embryonic development stage when millions of oogonia are formed within each ovary.
(ii) Graafian follicle releases primary oocyte from the ovary by ovulation.
(iii) At puberty only 60,000 – 80,000 primary follicles are left in each ovary.
(iv) Secondary oocyte within tertiary follicles grows in size and completes its second meiotic division.
(v) Each primary oocyte gets surrounded by a layer of zona pellucida.

(a) (i), (ii) and (iii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) all the five statements

17. Bulbourethral gland is present in

(a) Males and is another name for Uterus masculina
(b) Females and is another name for Bertholin’s gland
(c) Males and is another name for Cowper‘s gland
(d) None of these

18. Assertion: Prolactin is also called the ‘milk ejection hormone’.
        Reason: Oxytocin stimulates the smooth muscle contractions of the mammary glands.

(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(b) (A) is correct but (R) is not correct
(c) (A) is not correct but (R) is correct
(d) Both (A) and (R) are correct and (R) is the correct explanation of (A)