AFMC Biology Paper set for practice

Free

AFMC Biology Paper set 6

Time left =

In sickle cell anaemia 6-valine of ββ-chain forms hydrophobic bonds creating helical polymer of ?????????? strands

1 5

2 8

3 14

4 28

2

Holandric genes occur over Y-chromosome in

1 Homologous region

2 Heterochromatic regions

3 Nonhomologous region

4 All the above

3

Theory of heterogamesis for allosomic sex determination was given by

1 Correns

2 Bateson

3 Boveri

4 Davenport

4

Haemophilia C is due to nonformation of clotting factor

1 VII

2 VIII

3 IX

4 XI

5

Select the correct match

1 Haemophilia - Y linked

2 Phenylketonuria - Autosomal dominant trait

3 Sickle cell anaemia - Autosomal recessive trait, chromosome-11 0%

4 Thalassemia - X linked

6

Glycogen is a homopolymer made of

1 Glucose units

2 Galactose units

3 Ribose units

4 Amino units

7

Many organic substances are negatively charged e.g., acetic acid, while others are positively charged e.g., ammonium ion. An amino acid under certain conditions would have both positive and negative charges simultaneously in the same molecule. Such a form of amino acid is called

1 Positively charged form

2 Negatively charged form

3 Neutral form

4 Zwitterionic form

8

identify the substances having glycosidic bond and peptide bond, respectively in their structure

1 Chitin, cholesterol

2 Glycerol, trypsin

3 Cellulose,lecithin

4 Inulin, insulin

9

In which of the following techniques, the embryos are transferred to assist those females who cannot conceive ?

1 ZIFT and IUT

2 GIFT and ZIFT

3 ICSI and ZIFT

4 GIFT and ICSI

10

Drought resistant xerophytes are able to tolerate drought due to

1 Deep roots

2 Succulence

3 Growth in only rainy season

4 Crassulacean acid metabolism

11

Grasslands of New Zealand are called

1 Prairies

2 Pampas

3 Steppes

4 Tussocks

12

The process of growth is maximum during :

1 Log phase

2 Lag phase

3 Senescence

4 Dormancy