Food Chemistry MCQ with Answer Quiz Part-2 | Food Chemistry | Foodtech E-Learning

 

1.Gel electrophoresis separates molecules according to their ___.

A) Wavelengths of light absorbed
B) Polarity
C) solubility
D) Matrix

ANSWER= (B) Polarity

 

2. In agarose gel electrophoresis, DNA is moved towards the

A) cathode
B) anode
C) DNA doesn't move
D) none of above

ANSWER= (A) cathode

 

3. In SDS electrophoresis, proteins are separated on basis of

A) charge
B) mass
C) both A and B
D) structure

ANSWER= (B) mass

 

4. If proteins are separated according to their electrophoretic mobility then type of electrophoresis is

A) SDS page
B) free flow electrophoresis
C) electro focusing
D) affinity electrophoresis

ANSWER= (A) SDS page

 

5. Transparent container in spectrophotometer called

A) cuvette
B) filter or monochromator
C) detector
D) source

ANSWER= (A) cuvette

 

6. Which is function by absorbing large portions of the spectrum while transmitting relatively limited wavelength regions.

A) detector
B) source
C) cuvette
D) filter

ANSWER= (D) filter

 

7. The most common cell path for UV-Visible region is

A) 1cm
B) 10cm
C) 5cm
D) 100cm

ANSWER= (A) 1cm

 

8. What is NIR?

A) Net infra red spectrophotometry
B) Net Inter Radio spectrophotometry
C) Non Inter Radio spectrophotometry
D) Non Infra Red spectrophotometry

ANSWER= (A) Net infra red spectrophotometry

 

9. Which scale is a standard used internationally to relay values of color in relation to lightness?

A) SCP scale
B) CIE scale
C) CSE scale
D) PEC scale

ANSWER= (A) SCP scale

 

10. Which of the following will oscillate the fastest?

A) A large mass on a weak spring
B) A large mass on a stiff spring
C) A little mass on a stiff spring
D) A large mass on a weak spring

ANSWER= (B) A large mass on a stiff spring

 

11. In the equation, A = ε bc, what quantity is represented by "ε"?

A) Absorbtivity
B) Molar absorbtivity
C) Path length
D) None of these

ANSWER= (B) Molar absorbtivity

 

12. Why must the voltage supplied to a tungsten lamp be very stable?

A) Because if it wasn't the lamp world bum out
B) Because amount of energy the lamp emits is proportional to the fourth power of the ope
C) Because the lamp will only function at a specific voltage
D) All of the above

ANSWER= (B) Because amount of energy the lamp emits is proportional to the fourth power of the ope

 

13. Where does a carbonyl (C=0) stretch appear in an IR spectrum?

A) 1740-1720
B) 1870-1650
C) 3640-3250
D) 160-110

ANSWER= (B) 1870-1650

 

14. Which of the following is not an IR vibrational mode?

A) Stretching
B) Scissoring
C) Rocking
D) Rolling

ANSWER= (D) Rolling

 

15. In gel electrophoresis, molecules with a negative charge will ____.

A) move towards the anode
B) move towards the cathode
C) move towards the negative electrode
D) stay in the well

ANSWER= (A) move towards the anode