Lesson 1 Exam

   

Question 1

5 / 5 points

Which of these would be a valid hypothesis?

Question options:

  

Human history is determined by a   series of supernatural events.

 

Humans should help in the   conservation of other animal species.

 

Humans are controlled by forces   beyond our understanding.

 

Humans and bacteria share a common   genetic code.

 

Question 2

5 / 5 points

       

The following molecule is best described as a: CH3—CH2—CH2—CH2

Question options:
  

protein.

 

carbohydrate.

 

hydrocarbon.

 

lipid.

 

Question 3

5 / 5 points
       

Carbohydrates typically include:

Question options:
  

an   NH₂ group.

 

C, H, and O atoms.

 

nucleotide

s.

 

a   PO₄ group.

 

Question 4

5 / 5 points
       

Taxonomy is the:

Question options:
  

study of cells.

 

naming and classifying of   organisms.

 

study of organisms and their   interaction with the environment.

 

study of genes.

 

Question 5

5 / 5 points
       

An atom with an electrical charge is a(n):

Question options:
  

isotope.

 

molecule.

 

ion.

 

compound.

 

Question 6

5 / 5 points
       

__________ is an example of an element.

Question options:
  

Water

 

Carbon

 

Glucose

 

Salt

 

Question 7

5 / 5 points
       

A fat that is hydrogenated is:

Question options:
  

more unsaturated.

 

easier to digest.

 

more solid.

 

less likely to cause strokes.

 

Question 8

5 / 5 points
       

Sometimes when I have my morning coffee, which I drink black with no sugar, I notice a thin film floating on top of the coffee. Since I have just read Chapter 3 of the text, I now realize the nature of this substance and so I run to my friend screaming, “Look at this __________ in my coffee!”

Question options:
  

hydrophilic substance

 

hydrophobic substance

 

glucose

 
nucleotide
 

Question 9

5 / 5 points
       

How many oxygen atoms are in the products of the following reaction?
 

C6H12O6 + 6 H2O + 6 O2 → 6 CO2 + 12 H2O 

Question options:
  
18
 
6
 
12
 
24
 

Question 10

5 / 5 points
       

In what way(s) is the science of biology influencing and changing our culture?

Question options:
  

By helping us understand the   relevance of evolution to human health

 

By revealing how mutations in   genes can lead to disease

 

By providing new tools for   forensic investigations

 

All of the above

 

Question 11

5 / 5 points
       

Science is:

Question options:
  

the inquiry-based effort to   describe and explain nature.

 

the search for truth.

 

an organized set of principles for   how to ethically and morally behave.

 
All of the above
 

Question 12

5 / 5 points
       

People with lactose intolerance do not have enough:

Question options:
  

galactose.

 

lactase.

 

glucose.

 

fructose.

 

Question 13

5 / 5 points
       

In the following reaction, what type of bond is holding the two atoms together?
 

K + Cl → K+ + Cl- → KCl 

Question options:
  

Hydrophilic

 

Ionic

 

Hydrophobic

 

Covalent

 

Question 14

0 / 5 points

       

Which of these is required for natural selection to occur?

Question options:
  

Inheritance

 

Unequal reproductive success

 

Individual variation

 

All of the above   (Incorrect)

 

Question 15

5 / 5 points
       

Humans are composed of __________ cells.

Question options:
  

bacterial

 

eukaryotic

 

plant

 

prokaryotic

 

Question 16

0 / 5 points
       

The model on the left is not realistic in that:

Question options:
  

neutrons are not located in the   nucleus.

 

the electrons should be much   farther away from the nucleus.

 

electrons do not orbit   the nucleus in a ring shape. (Incorrect)

 

electrons do not have a negative   charge.

 

Question 17

5 / 5 points
       

Beryllium’s atomic mass is 9 and its atomic number is 4. How many neutrons are found in a beryllium atom?

Question options:
  
9
 
13
 
4
 
5
 

Question 18

5 / 5 points
       

Which of the following is water hydrophilic?

Question options:
  

Cellulose

 

Testosterone

 

Butter

 

Cholesterol

 

Question 19

5 / 5 points
       

A base:

Question options:
  

removes H₂O   molecules from a solution.

 

decreases the pH of a solution.

 

removes OH^—   ions from a solution. 

 

removes H⁺   ions from a solution. 

 

Question 20

5 / 5 points
       

Which of the following is a health effect of a diet high in saturated fats?

Question options:
  

Increased blood flow

 

Decreased risk of atherosclerosis

 

Increased risk of heart attack

 

Decreased risk of stroke