Exam 1

Question 1

What is the strand of DNA that will pair with this one?

5’ - ATGCCTATT -3’

Answer 1

5’ - AATACGCAT - 3’

Question 2

Ribose and deoxyribose are both found in nucleic acids. The difference between ribose and deoxyribose is that:

Answer 2

Deoxyribose has one less oxygen than ribose and deoxyribose is found in DNA whereas ribose is found in RNA

Question 3

What is the normal flow of information in the eularyotic cells

Answer 3

DNA -> RNA -> proteins

Question 4

What is the reason why hydrocarbons are not soluble in water?

Answer 4

The majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages.

Question 5

Large biological molecules: True or False:
They are an important constituent of cell membranes, they contain more energy than an equivalent weight of polysaccharides, and they are insoluble in water.

Answer 5

True

Question 6

Starch and glycogen, which are both polysacccharides, differ in their functions in that starch is _____ whereas glycogen ____.

Answer 6

The principle energy storage compound of plants; is the main energy storage of animals.

Question 7

In the DNA of certain bacteria cells, 20% of the bases are guanine (G). What is the % of adenine (A)?

Answer 7

30%

Question 8

Which of the following are not functions of carbohydrates?

• They transport energy throughout the human body
• They store energy
• Thet are a part of other molecules like DNA and RNA, which carry genetic information
• They are used as structural support in plants
• None of the above (in other words, all of these are functions of carbohydrates).

Answer 8

None of the above

Question 9

Which of the following bonds are ionic?

• K-Cl
• O-H
• O-P
• H-C
• C-N

Answer 9

K-Cl is an ionic bond

Question 10

Which of the following bonds are non-polar?
N-H
O-H
O-P
H-C
C-O

Answer 10

H-C is not an ionic bond

Question 11

____ reactions form bonds between monomers thereby making biological polymers, while _____ reactions break the bonds that form biological polymers, thereby converting the polymers back into monomers.

Answer 11

Dehydration; Hydrolysis

Question 12

When you make a general conclusion from observing specific events you are using:

Answer 12

Inductive logic

Question 13

What are the six most abundant elements found in living systems?

Answer 13

Hydrogen, oxygen, nitrogen carbon, sulfur, and phosphorus.

Question 14

How many neutrons are present in the nucleus of a phosphorus (P) atom? (there will be a chart on the test)

Answer 14

16

Question 15

What do cohesion, surface tension, and adhesion have in common with reference to water?

Answer 15

All are properties related to hydrogen bonding.

Question 16

Which of the following phenomena is most likely due to the high heat of vaporization of water?

• If a glass of water is slightly overfilled, the water will form a convex surface above the top of the glass.
• The boiling point of water is much higher than the boiling point of methane.
• A water bug can run across the surface of liquid water.

Answer 16

The boiling point of water is much higher than the boiling point of methane.