bio lab exam 2 study guides 4/5

Question 1

Wood is a complex carbohydrate called cellulose. What product is produced both by burning wood and by chemical respiration of carbohydrates?

Answer 1

carbon dioxide

Question 2

What are the products of photosynthesis?

Answer 2

glucose and oxygen

Question 3

What happened to the water solution with phenol red when you breathed into it?

Answer 3

the color changed from red to yellow/ orange

Carbon dioxide, which is acidic when dissolved in water, changed the color of the phenol red form red to orange.

Question 4

In the lab what happened when phenol red was added to water?

Answer 4

turned red

Question 5

When Elodea stems were inserted into the orange solution what happened to the solution over time? What caused the change?

Answer 5

The solution turned back into its original red color because the plant absorbed carbon dioxide for photosynthesis.

Question 6

You added Sodium Azide (actually, your TA did) in order to do what?

Answer 6

Sodium Azide interfered with the electron transport system, preventing aerobic respiration.

Question 7

What naturally-occurring gas contributes to the process of global warming and how is it related to photosynthesis and cell respiration?

Answer 7

Carbon dioxide. Respiration produces carbon dioxide and photosynthesis uses carbon dioxide to make sugar and oxygen.

Question 8

A respirometer experiment testing the ability of yeast cells to utilize various fuels for respiration yielded the following information:

Sucrose-2.2, Glycerol-0.08, Protein-0.5. Which substance was most effective?

Answer 8

Sucrose (carbohydrate)

Question 9

According to the answers published on our web site what was the order of effectiveness of the respiratory fuels used to produce respiration in yeast?

Answer 9

Sucrose, glycerol, and protein.

Question 10

List four substances necessary for a plant to grow.

Answer 10

Water, sunlight, carbon dioxide, and oxygen.

Question 11

What are the 2 most abundant “greenhouse gasses” and which one is most abundant?

Answer 11

carbon dioxide and water vapor .

1 is water vapor

Question 12

During what stage in a cell cycle does DNA replicate?

Answer 12

interphase

Question 13

What are the names of the 4 bases that form the “sequence” of DNA?

Answer 13

Adenine, Cytosine, Guanine, Thymine

Question 14

What would the complementary DNA sequence be for this DNA single strand: CATATACGCATATAC ?
GTATATGCGTATATG

Answer 14

GTATATGCGTATATG

Question 15

What would happen if you used one restriction enzyme to cut the DNA found at the crime scene and different ones to cut the DNA of the suspects?

Answer 15

If you used one restriction enzyme at crime scene and a different one on the suspect, you would not find a matching sequence of DNA because the specific sequences you are looking for would be different.

Question 16

What exactly did you need to see to determine if a suspect’s DNA matched the crime scene?

Answer 16

You needed a sample of DNA from the crime scene and a sample from the suspect and a gel electrophoresis apparatus. From there you ran the test to see of the DNA from the crime scene matched the suspects from the results of the gel electrophoresis.

Question 17

In our gel electrophoresis, why do some DNA fragments migrate farther from their starting point than others in the same lane of the gel?

Answer 17

dye idk

Question 18

What 2 types of chemicals make up the “backbone” of the 2 strands of a DNA double-helix?

Answer 18

sugars and phosphates

Question 19

What type of chemicals make up the rungs of the ladder that join across from one DNA backbone to it’s parallel other backbone?

Answer 19

the complementary pairs of nitrogen bases

a = t
g = c

Question 20

How many different kinds of ladder components are there in DNA?

Answer 20

4

a = t 
g = c

Question 21

What are the letters for those chemicals from #13 but not found in DNA, instead, write the letters found in RNA:

Answer 21

g
u
a
c