Chapter 3
The cell theory states
A. all organisms are composed of only one cell.
B. organelles are the basic living unit of structure and function of organisms.
C. all cells come only from other cells.
D. all organisms are composed of only one cell AND organelles are the basic
living unit of structure and function of organisms.
C. all cells come only from other cells.
According to the fluid-mosaic model of membrane structure,
A. proteins make up the bulk of the membrane.
B. only lipids are found in the membrane.
C. cholesterol is the main constituent of the membrane.
D. proteins float inside or within the phospholipid bilayer.
D. proteins float inside or within the phospholipid bilayer.
Which statement most accurately describes the second law of thermodynamics?
A. Energy cannot be changed from one form to another without a loss of usable
energy.
B. One usable form of energy can be completely converted into another usable
form.
C. Energy cannot be created nor destroyed but it can be changed from one form
to another.
D. Energy cannot be created or destroyed.
A. Energy cannot be changed from one form to another without a loss of usable
energy.
Which of the following is a way to control for confounding variables in the antibiotic
experiment covered in the textbook?
A. using many replicates
B. using a double blind study design
C. randomly assigning test subjects to different groups.
D. all of the answers are true
D. all of the answers are true
Proteins are processed and modified in the interior of the
A. mitochondria.
B. nucleus.
C. chloroplasts.
D. rough endoplasmic reticulum.
D. rough endoplasmic reticulum.
Permeability refers to
A. the movement of molecules from an area of greater concentration to an area
of lesser concentration.
B. the extent to which a membrane allows a substance to pass through.
C. the amount of solute in a solution.
D. the ability to establish a permanent solute level in a solution.
B. the extent to which a membrane allows a substance to pass through.
ATP contains
A. an adenine base and two phosphate groups.
B. an adenine base and three phosphate groups.
C. an adenine base, a ribose sugar, and two phosphate groups.
D. an adenine base, a ribose sugar, and three phosphate groups.
D. an adenine base, a ribose sugar, and three phosphate groups.
B. the more acidic the solution.
Cellular respiration is best associated with the
A. Golgi apparatus.
B. ribosome.
C. mitochondrion.
D. chloroplast.
E. microtubule.
C. mitochondrion.
If 0.9% NaCl were isotonic to a cell, then
A. 0.9% would also be hypotonic.
B. 0.9% would also be hypertonic.
C. 1.0% would be hypertonic.
D. 1.0% would be hypotonic.
E. 0.1% would be hypertonic.
C. 1.0% would be hypertonic.
During an enzymatic reaction, what happens to the enzyme?
A. It becomes the product.
B. It becomes the substrate.
C. It is used up.
D. The enzyme and the substrate form a temporary complex
D. The enzyme and the substrate form a temporary complex
Learned behavior that causes a family of baby ducks to follow their mother is called
A. imprinting.
B. operant conditioning.
C. extinction.
D. motivation.
A. imprinting.
The innermost membrane of the chloroplast is referred to as the
A. thylakoid membrane.
B. inner membrane.
C. cristae.
D. stroma.
A. thylakoid membrane.
When a substance moves from an area of low concentration to an area of high
concentration while using energy, the process is termed
A. diffusion.
B. osmosis.
C. facilitated diffusion.
D. active transport
D. active transport
The function of an enzyme is to
A. provide the energy for metabolic reactions.
B. increase the rate of a metabolic reaction.
C. change the direction of metabolic reactions.
D. raise the energy of activation for a reaction.
B. increase the rate of a metabolic reaction.
A number of populations of different species interacting with one another in a natural
environment, such as a rotten log, is called
A. competition.
B. a community.
C. predation.
D. symbiosis.
B. a community.
In order to digest materials within a cell, the material to be digested must fuse with
A. a lysosome.
B. the Golgi apparatus.
C. a secretory vesicle.
D. smooth endoplasmic reticulum.
A. a lysosome.
Which condition must be met for diffusion to occur?
A. a differentially permeable membrane
B. a true solution
C. a concentration difference
D. a non-permeable membrane
C. a concentration difference
B. a product.
Which type of organism produces food in an ecosystem?
A. heterotroph
B. autotroph
C. consumer
D. herbivore
B. autotroph