Lab Practical Exam

Question 1

9. Water + Biuret (or Water + Benedict’s) in a test tube was which type of control?

Answer 1

Negative control

Question 2

Albumin + Biuret OR Glucose + Benedict test tubes were both which type of control?

Answer 2

Positive control

Question 3

Water and Biruet colors

Answer 3

Aqua-blue to green = negative/ Yellow to orange = positive

Question 4

Albumin and Biret colors

Answer 4

Denim-blue = negative/ Purple positive

Question 5

What was the name of the red solution that was used in the lipid test?

Answer 5

Sudan IV

Question 6

Starch will test ______for protein

Answer 6

negative

Question 7

Starch and onion

Answer 7

There is no starch present in the onion

Question 8

Starch and potato

Answer 8

There is starch present in the potato

Question 9

Starch and carrot

Answer 9

There is starch present in the carrot

Question 10

Sugar is ____ in water

Answer 10

Absent

Question 11

Sugar is ____ in glucose

Answer 11

present

Question 12

Sugar is ____ in onion juice

Answer 12

Present

Question 13

Sugar is _____in potato juice

Answer 13

Absent

Question 14

The Irish Potato tested _________ for starch but tested __________ for simple sugars

Answer 14

Positive/Negative

Question 15

What color did the ONION JUICE on turn at the end of the simple sugar test?

Answer 15

Yellow

Question 16

What color did the glucose turn?

Answer 16

Turned red

Question 17

What color did the water turn

Answer 17

Blue

Question 18

What color did the potato juice turn

Answer 18

blue

Question 19

Where lipids present in the water+oil?

Answer 19

Yes, only in the oil

Question 20

Are lipids present in the vegetable oil?

Answer 20

Yes, throughout.

Question 21

When you increase total magnification of a microscope from 40X to 400X, the diameter of field of view will ________.

Answer 21

Decrease

Question 22

When fermentation of apple cider was occurring in the small flasks, what gas was being released?

Answer 22

Co2

Question 23

19. In which area of the cell of the yeast does fermentation occur?

Answer 23

Cytoplasm

Question 24

What was the primary (most common) product that was produced in the bottom of the flask by fermentation of the
apple cider by the yeast (you could tell by the smell what it was!)?

Answer 24

Ethanol

Question 25

1. What molecule, electron carrier, is produced in fermentation so sugars can continue to be broken down by glycolysis?

Answer 25

NAD

Question 26

Which blood type would be considered the universal donor and which one would be the universal recipient?

Answer 26

O-/AB +

Question 27

24. What two-word term is a good descriptive phrase for an antigen?

Answer 27

Surface marker

Question 28

5. In which of these blood types and antibody serums would you expect a clumping reaction?

Answer 28

Type B and Antib antibodies

Question 29

In which portion of the blood tissue would you expect to find the antibodies?

Answer 29

In the plasma

Question 30

Where are the antigens found?

Answer 30

On the red blood cell

Question 31

Diffusion occurs faster at _________

Answer 31

higher temperatures

Question 32

Will diffussion occur in colder temperatures?

Answer 32

Yes, the rate will just be slower

Question 33

Hypontonic

Answer 33

Outside fluid has a lower solute concentration than the cell, water enters and the cell expands

Question 34

Isotonic

Answer 34

solute concentration is equal

Question 35

Hypertonic

Answer 35

The cell will loss water as the solute concentration of the extracellular fluid is less than inside the cell