Drug called ‘Heroin’ is synthesized by

• acetylation of morphine

• glycosylation of morphine

• nitration of morphine

• methylation of morphine

Match the following organisms with the products they produce.

Select the correct option.

• A - ii; B - iv; C - iii; D - v

• A - iii; B - iv; C - v; D - i

• A - ii; B - i; C - iii; D - v

• A - ii; B - iv; C - v; D - iii

In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place?

• Stabilizing Selection

• Disruptive Selection

• Cyclical Selection

• Directional Selection

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F₁ generation pink flowers were obtained. When pink flowers were selfed, the F₂ generation showed white, red and pink flowers. Choose the incorrect statement from the following :

• Pink colour in F₁ is due to incomplete dominance.

• Ratio of F₂ is $\frac{1}{4} \left(\mathrm{Red}\right) : \frac{2}{4} \left(\mathrm{Pink}\right) : \frac{1}{4} \left(\mathrm{White}\right)$

• Law of segregation does not apply in this experiment

• This experiment does not follow the Priniciple of Dominance

Expressed Sequence Tags (ESTs) refers to :

• Polypeptide expression

• DNA polymorphism

• Novel DNA sequences

• Genes expresses as RNA

Extrusion of second polar body from egg nucleus occurs :

• after fertilization

• before entry of sperm into ovum

• simultaneously with first cleavage

• after entry of sperm but before fertilization

Match the hominids with their correct brain size :

Select the correct option

• A - iii; B - ii; C - i; D - iv

• A - iii; B - iv; C - i; D - ii

• A - iv; B - iii; C - i; D - ii

• A - iii; B - i; C - iv; D - ii

Select the hormone-releasing Intra-Uterine Devices.

• Multiload 375, Progestasert

• Progestasert, LNG-20

• Lippes Loop, Multiload 375

• Vaults, LNG-20

Under which of the following conditions will there be no change in the reading frame of following mRNA?

5' AACAGCGGUGCUAUU 3'

• Deletion of G from 5^th position

• Insertion of A and G at 4^th and 5^th positions respectively

• Deletion of GGU from 7^th, 8^th and 9^th positions

• Insertion of G at 5^th position

60.

Colostrum the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the new born infants because it contains

• Monocytes

• Macrophages

• Immunoglobulin A

• Natural killer cells