Post Lecture Quiz 1

Question 1

The properties of water are most directly due to what type of bonds?

1) Polar covalent bonds
2) Hydrogen bonds
3) Ionic bonds
4) Peptide bonds

Answer 1

Hydrogen Bonds

Question 2

The molecular formula for glucose is C6H12O6. What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions?

1) C6H10O5
2) C18H10O15
3) C18H36O18
4) C18H32O16
5) C3H6O3

Answer 2

4) C18H32O16

Question 3

Which of the following is characteristic of the lytic cycle?

1) The viral genome replicates without destroying the host.
2) Many bacterial cells containing viral DNA are produced.
3) The virus-host relationship usually lasts for generations.
4) Viral DNA is incorporated into the host genome.
5) A large number of phages are released at a time.

Answer 3

5) A large number of phages are released at a time.

Question 4

Which of the following characteristics, structures, or processes is common to both bacteria and viruses?
1) genetic material composed of nucleic acid

2) cell division
3) ribosomes
4) independent existence
5) metabolism

Answer 4

genetic material composed of nucleic acid

Question 5

Which of the following takes place as an ice cube cools a drink?

1) Evaporation of the water in the drink increases.
2) Kinetic energy in the drink decreases.

3) The specific heat of the water in the drink decreases.
4) A calorie of heat energy is transferred from the ice to the water of the drink.
5) Molecular collisions in the drink increase.

Answer 5

2) Kinetic energy in the drink decreases.

Question 6

Which element is called the “backbone of life”?

1) Carbon
2) Oxygen
3) Hydrogen
4) Nitrogen
5) Phosphorus

Answer 6

1) Carbon

Question 7

Because organisms are made primarily of water, they resist rapid temperature changes. This useful quality is based on water’s _____.

1) high specific heat
2) ability to form colloids
3) cohesion
4) buffering activity
5) lower density in the solid phase

Answer 7

1) high specific heat

Question 8

How many electron pairs does carbon share in order to complete its valence shell?

1) 3
2) 8
3) 1
4) 2
5) 4

Answer 8

5) 4

Question 9

Differences among organisms are caused by

1) differences in the sizes of the organic molecules in each organism.
2) large differences in elemental composition from organism to organism.
3) differences in the types and relative amounts of organic molecules synthesized by each organism.
4) differences in the elements that bond with carbon in each organism.
5) differences in inorganic compounds present in each organism.

Answer 9

3) differences in the types and relative amounts of organic molecules synthesized by each organism.

Question 10

Research indicates that ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that
1) are mirror images of one another.

2) differ in the arrangement of atoms around their double bonds.
3) differ in the location of their double bonds.
4) exist in either linear chain or ring forms.
5) have identical chemical formulas but differ in the branching of their carbon skeletons.

Answer 10

1) are mirror images of one another.