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

5 / 5 points

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

5 / 5 points

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

5 / 5 points

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

5 / 5 points

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

5 / 5 points

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

Question options:

mitochondria

chloroplasts

lysosomes

central vacuoles

Question 18

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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.