SC160 Lesson 2 Exam SCORE 100 PERCENT

  

A balloon permeable to water but not to glucose contains a 10% glucose solution. A beaker contains a 5% glucose solution. Which of the following is true?

Question options:

  

The solution in the beaker is   hypertonic relative to the solution in the balloon.

 

The solution in the balloon is   isotonic; the solution in the beaker is hypertonic.

 

When placed in the beaker, the balloon   will lose water by osmosis.

 

The solution in the balloon is   hypertonic relative to the solution in the beaker.

 

Question 2

5 / 5 points

       

Relaying a message from a receptor protein to a molecule that performs a specific function within a cell is called:

Question options:

  

signal transduction.

 

inhibition.

 

self-recognition.

 

selective permeability.

 

Question 3

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Microtubules are associated with:

Question options:

  

cilia.

 

flagella.

 

cell shape.

 

All of the above

 

Question 4

5 / 5 points

       

Usually, enzymes are:

Question options:

  

fats.

 

steroids.

 

chemical reactions.

 

proteins.

 

Question 5

5 / 5 points

       

Which of the following processes could result in the net movement of a substance into a cell, if the substance is more concentrated in the cell than in the surroundings?

Question options:

  

Active transport

 

Facilitated diffusion

 

Diffusion

 

Osmosis

 

Question 6

5 / 5 points

       

Substances that plug up an enzyme's active site are:

Question options:

  

enzyme substrates.

 

enzyme inhibitors.

 

induced fit factors.

 

enzyme products.

 

Question 7

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Functions of the smooth endoplasmic reticulum include:

Question options:

  

steroid synthesis, protein   synthesis, and drug detoxification.

 

lipid synthesis, protein   synthesis, and drug detoxification.

 

lipid synthesis, steroid   synthesis, and drug detoxification.

 

lipid synthesis, steroid   synthesis, and protein synthesis.

 

Question 8

5 / 5 points

       

If placed in tap water, an animal cell will undergo lysis, whereas a plant cell will not. What accounts for this difference?

Question options:

  

Expulsion of water by the plant   cell's central vacuole

 

The relative impermeability of the   plant cell membrane to water

 

The relative impermeability of the   plant cell wall to water

 

The relative inelasticity and   strength of the plant cell wall

 

Question 9

5 / 5 points

       

The endomembrane system includes:

Question options:

  

ribosomes, lysosomes, vacuoles,   and the endoplasmic reticulum.

 

Golgi apparatus, ribosomes,   vacuoles, and the endoplasmic reticulum.

 

Golgi apparatus, lysosomes,   ribosomes, and the endoplasmic reticulum.

 

Golgi apparatus, lysosomes,   vacuoles, and the endoplasmic reticulum.

 

Question 10

5 / 5 points

       

Tobacco smokers (and those exposed to tobacco smoke) are at greater risk of an ectopic (tubal) pregnancy. Based on your understanding of the structures of the cytoskeleton, what is the best explanation?

Question options:

  

Tobacco smokers tend to get   pregnant when they are younger.

 

Tobacco interferes with the   functioning of the flagella propelling sperm.

 

Tobacco interferes with the   transfer of oxygen to the uterus, thereby forcing the zygote to implant in a   fallopian tube.

 

Tobacco interferes with the   sweeping motion of cilia that aids in the movement of the egg toward the   uterus.

 

Question 11

5 / 5 points

       

In eukaryotic cells, what name is given to the region between the nucleus and the plasma membrane?

Question options:

  

Cytoplasm

 

Phospholipid bilayer

 

Nucleoid

 

Chloroplast

 

Question 12

5 / 5 points

       

Osmosis can be defined as:

Question options:

  

the diffusion of water.

 

the diffusion of nonpolar   molecules.

 

active transport.

 

the diffusion of a solute.

 

Question 13

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Which theory states that all living things are composed of cells?

Question options:

  

Cell theory

 

Hooke's rule

 

Evolutionary theory

 

Mendel's law

 

Question 14

5 / 5 points

       

Ten kilocalories are equivalent to __________ calories.

Question options:

  

1,000

 

10,000

 

0.1

 

100

 

Question 15

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A rock on the top of a mountain contains __________ energy.

Question options:

  

potential

 

no

 

kinetic

 

conserved

 

Question 16

5 / 5 points

       

Information is transferred from the nucleus to ribosomes via:

Question options:

  

Mrna.

 

rough endoplasmic reticulum.

 

DNA.

 

smooth endoplasmic reticulum.

 

Question 17

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In plant cells, __________ may contain organic nutrients, pigments, and poisons.

Question options:

  

mitochondria

 

chloroplasts

 

lysosomes

 

central vacuoles

 

Question 18

5 / 5 points

       

The region of an enzyme to which a substrate binds is called the __________ site.

Question options:

  

active

 

substrate

 

enzymatic

 

conformational

 

Question 19

5 / 5 points

       

Which organelle is responsible for photosynthesis?

Question options:

  

Smooth endoplasmic reticulum

 

Mitochondrion

 

Ribosome

 

Chloroplast

 

Question 20

5 / 5 points

       

Diffusion is an example of:

Question options:

  

phagocytosis.

 

active transport.

 

endocytosis.

 

passive transport.