A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution?

• Yellow

• Green

• Blue

• Red

The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is

• 20 mm Hg

• 75 mm Hg

• 30 mm Hg

• 50 mm Hg

Centromere is required for

• transcription

• crossing over

• cytoplasmic cleavage

• movement of chromosomes towards poles

Damage to thymus in a child may lead to

• a reduction in haemoglobin content of blood

• a reduction in stem cell production

• loss of antibody mediated immunity

• loss of cell mediated immunity

G-6-P dehydrogenase deficiency is associated with haemolysis of

• lymphocytes

• RBCs

• platelets

• leucocytes

Which of the following substances, if introduce in the blood stream, would cause coagulation, at the site of its introduction?

• Fibrinogen

• Prothrombin

• Heparin

• Thromboplastin

7.

Nucleotide are building blocks of nucleic acids, nucleotide is a composite molecule formed by

• (base-sugar-phosphate)n

• base-sugar-OH

• base-sugar-phosphate

• sugar-phosphate

Which of the following is the simplest amino acid?

• Tyrosine

• Asparagine

• Glycine

• Alanine

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these

• enhance oxidative metabolism

• are conjugated proteins

• are exclusively synthesized in the body of a living organism as at present

• help in regulating metabolism

In a man, abducens nerve is injured. Which one ofthe following functions will be affected?

• Movement of the eye ball

• Swallowing

• Movement of the tongue

• Movement of the neck