Biological Tools and Techniques MCQs

Question 1

An ultraviolet light source is used in

Accepted Answer

Fluorescent microscope

Answer

Phase - contrast microscope

Answer

Dark field microscope

Answer

Electron microscope

Question 2

Element contaminating the water body is determined and quantified by using one of the following methods

Accepted Answer

All the above

Answer

Colorimeter

Answer

Spectrophotometer

Answer

Atomic absorption spectrometer

Question 3

Which of the following technique does not give a viable count?

Accepted Answer

Dry weight determination

Answer

Most probable number

Answer

Direct microscopic count

Answer

Turbidometry

Question 4

The most effective germicidal wavelength of UV is

Accepted Answer

260 nm

Answer

400 nm

Answer

360 nm

Answer

260 rads

Question 5

Which one of the following is used to study the structural details of biological tissues using freezefracture technique?

Accepted Answer

Transmission electron microscopy

Answer

Scanning electron microscopy

Answer

Atomic force microscopy

Answer

Phase contrast microscopy

Question 6

Which of the following instruments is based on Bragg's law?

Accepted Answer

XRD

Answer

AAS

Answer

Spectrophotometer

Answer

Scanning electron microscope

Question 7

Sedimentation efficiency depends on the relative strength of

Accepted Answer

Drag versus gravitational force

Answer

Drag versus centrifugal force

Answer

Gravitational force versus centrifugal force

Answer

Gravitational force versus electrostatic force

Question 8

The typical temperature for autoclaving (operating at 15 pounds per square inch of pressure) is

Accepted Answer

121°C

Answer

100°C

Answer

63°C

Answer

200°C

Question 9

To understand the 3D structure of the molecule following technique is called

Accepted Answer

X - ray diffraction

Answer

Atomic absorption spectrophotometry

Answer

MPTLC

Answer

GC - MS/MS