Quiz 1

Question 1

True or False

The required temperature for success sterilization in a pressure cooker is 121°C for 15-20 mins

Answer 1

False

15 mins for pressure cooker; no specified temp

Question 2

true or false

Microwave can be used for dry sterilization

Answer 2

true

Question 3

true or false

Laboratory gowns and gadgets are allowed inside laboratory premises?

Answer 3

false

not allowed

Question 4

true or false

If you have extra reagents in the beaker, you must return it to the reagent bottle

Answer 4

false

must not

Question 5

true or false

There should be a separate pens and pads inside the isolation room

Answer 5

true

Question 6

true or false

Running around the laboratory is strictly prohibited

Answer 6

true

Question 7

true or false

**Vortex ** can be used to separate certain substances with different densities

Answer 7

false

centrifuge

Question 8

true or false

Inoculation needle is used to pick up colonies of bacteria

Answer 8

true

Question 9

true or false

Glass slide can be used to observe the motility of microorganisms

Answer 9

false

depression slide

Question 10

true or false

Erlenmeyer flask is used for mixing substances and media preparation

Answer 10

true

Question 11

true or false

**Course objectives **are used when you are observing under LPO or scanner

Answer 11

false

Coarse adjustment knob

Question 12

true or false

magnification is directly proportional to numerical aperture

Answer 12

true

Question 13

true or false

Unstained moving organisms can be best viewed using darkfield microscope

Answer 13

phase contrast microscope

Question 14

true or false

compound microscope uses visible light (natural or artificial)

Answer 14

true

Question 15

true or false

Fluorescence microscope is best used if specimen is dyed with any staining reagent, and is observed in a dark room

Answer 15

false

specific fluorescent dye

Question 16

true or false

parfocal means the image observed has constant quality even you have changed the objective lens

Answer 16

true

Question 17

true or false

depth of focus is inversely proportional to NA but directly proportional to magnification

Answer 17

false

inversely proportional to NA and magnification

Question 18

true or false

when handling the microscope, it is advise to hold the arm with your dominant hand and support the base with the other hand

Answer 18

true

Question 19

true or false

phase contrast microscope is used in observing motile and stained organisms

Answer 19

false

unstained

Question 20

true or false

when returning the microscope, you should clean all parts, including the lenses, using any clean cloth

Answer 20

false

lenses cannot be cleaned by cloth