Biology

1.One of the following is most suitable for study of mutations

Haploids 

Diploids 

Tetraploids

Polyploid

2.One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?

Having waited a day, it is too late to take an antibiotic 

You need an antiseptic, not an antibiotic 

You need to be vaccinated instead of taking an antibiotic 

You are infected by a virus

3.Ptyalin is an enzyme produced in the

salivary glands 

pituitary glands 

thyroid glands 

pancreas

4.Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes

tetanus 

influenza 

cholera

typhoid

5.Other than spreading malaria, anopheles mosquitoes are also vectors of

dengue fever 

filariasis 

encephalitis 

yellow fever

Biology

1. Monotremes are unique mammals because they

posses hair 

give birth to live young 

secret milk in a pouch 

lay eggs

2.Poison glands of snakes are homologous to

electric organs of fishes 

stings of rays

sebaceous glands of mammals

salivary glands of vertebrates

3.Radical vascular bundles are those in which

xylem is surrounded by phloem 

phloem is surrounded by xylem

xylem and phloem occur on the same radius 

xylem and phloem occur on the different radii

4.Organic Substances which, in very small amounts, control growth and development called

vitamins

hormones 

enzymes 

None of the above

5.Rain water helps to increase the ____ to some extent.

phosphorous contents 

nitrogen contents 

calcium contents

potash contents

Biology - GK

1.Movement of cell against concentration gradient is called

osmosis active transport diffusion passive transport

2.Photosynthesis generally takes place in which parts of the plant?

Leaf and other chloroplast bearing parts stem and leaf Roots and chloroplast bearing parts Bark and leaf

3.Plants synthesis protein from

starch sugar amino acids fatty acids

4.Plants absorb dissolved nitrates from soil and convert them into

free nitrogen urea ammonia proteins

5.One of the following is not a function of bones.

Place for muscle attachment Protection of vital organs Secretion of hormones for calcium regulation in blood and bones Production of blood corpuscles

Biology

1.Ordinary table salt is sodium chloride. What is baking soda?

Potassium chloride Potassium carbonate Potassium hydroxide Sodium bicarbonate

2.Ozone hole refers to

hole in ozone layer decrease in the ozone layer in troposphere decrease in thickness of ozone layer in stratosphere increase in the thickness of ozone layer in troposphere

3.Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to

angiosperms gymnosperms monocotyledons dicotyledons

4.Pollination is best defined as

transfer of pollen from anther to stigma germination of pollen grains growth of pollen tube in ovule visiting flowers by insects

5.Plants receive their nutrients mainly from

chlorophyll atmosphere light soil