Which statement about active transport is true?
•
It involves the use of DNA.
•
It involves smaller molecules only.
•
It does not require transport proteins.
•
It requires ATP molecules.
2
Which of the
...
Which statement about active transport is true?
•
It involves the use of DNA.
•
It involves smaller molecules only.
•
It does not require transport proteins.
•
It requires ATP molecules.
2
Which of the following statements about enzymes is true?
•
Enzymes are single-use proteins that must be regenerated after each reaction.
•
Enzymes can only break down larger substances into smaller ones.
•
Enzymes are composed primarily of carbohydrates.
•
The function of an enzyme is to speed up chemical reactions that occur in your body.
3
Which of the following is a component of cell membranes and includes a hydrophilic head, a glycerol backbone and two fatty acid tails?
•
Nucleic acids
•
Fatty acids
•
Phospholipids
•
Triglycerides
4
What role do sensory receptors play in feedback loops to maintain homeostasis?
•
Reverse the effects of stimuli
•
Respond to stimuli
•
Detect stimuli
•
Interpret stimuli
5
Amy wonders if it takes her longer to get home from work when it's raining.
Which of the following could be her observation?
•
"Based on many tests, I realize that it does indeed take me longer to get home from work on rainy days."
•
"I propose that it takes me longer to get home from work when it's raining."
•
"I notice that I get home from work later on rainy days."
•
"Does rain have an impact on the length of my evening commute?"
6
What is chromatin?
•
A form of uncondensed DNA found within the nucleus of the cell
•
A structure found within the nucleus that produces subunits of ribosomes
•
A condensed form of DNA that occurs when the cell is dividing
•
A cell organelle that houses the DNA and controls activity within the cell
7
Which of the following sources of information is most credible?
•
An article in the science section of a local newspaper
•
An article in a popular magazine
•
An article in a peer-reviewed journal
•
An article written for the school paper by a science teacher
8
What is a nucleotide?
•
An organelle found in eukaryotic cells that houses the DNA and controls activity within the cell
•
A component of DNA and RNA made up of sugar, a phosphate group and a nitrogen base
•
A nucleic acid that produces protein in cells
•
A nucleic acid that contains all the genetic information of an organism
9
What is the cytosol?
•
A part of the plasma membrane between the two layers of phospholipids
•
The liquid found inside the cytoplasm that is mostly composed of water
•
A part of the cytoskeleton that helps anchor membrane proteins
•
The protein structure that provides support to the cell
10
Which of the following characteristics is shared by all organisms?
•
Cycles of consciousness and sleep
•
The ability to grow and reproduce
•
Being made up of multiple cells
•
Division into multiple sexes
11
Which of the following is carried out by vesicles?
•
Organizing organelles prior to division
•
Breaking down substances within the cell
•
Synthesizing proteins
•
Facilitated diffusion
12
What is true about the electron transport chain (ETC)?
•
ATP and water are products of the electron transport chain.
•
The electron transport chain produces the same number of ATP as the Krebs cycle.
•
The largest byproduct of the electron transport chain is carbon dioxide.
•
The electron transport chain takes place in the cytoplasm of the cell.
13
Which of the following is produced by the endoplasmic reticulum?
•
Nucleic acids
•
ATP
•
Carbohydrates
•
Lipids
14
Select the statement that is TRUE regarding metabolism.
•
In catabolism, complex carbohydrates are formed from smaller molecules.
•
In anabolism, complex carbohydrates are broken down into basic sugars.
•
In anabolism, complex carbohydrates are formed from smaller molecules.
•
In catabolism, monosaccharides are turned into polysaccharides.
15
What type of lipid is made up of a glycerol molecule and three fatty acid side chains?
•
Saturated fat
•
Triglyceride
•
Sterol
•
Phospholipid
16
Which of the following describes a disaccharide?
•
It has many sugar units.
•
It can have up to two sugar units.
•
It is also an oligosaccharide.
•
It has no sugar units.
17
What is true regarding phosphorylation?
•
It helps transfer energy from the glucose molecule to a molecule of ADP in order for glycolysis to be carried out.
•
It strips ATP of all of its phosphate groups.
•
It involves combining glucose molecules in order to be used as fuel for glycolysis.
•
It occurs when ATP donates one of its phosphate groups to a molecule of glucose during glycolysis.
18
Which of the following statements is true?
•
Diffusion involves the movement of molecules into or out of a cell.
•
Diffusion involves the movement of molecules using transport proteins.
•
Diffusion involves the movement of molecules in the cytoplasm.
•
Diffusion involves the breaking down of dead organelles.
19
At what level of protein structure do amino acid chains twist and fold?
•
Primary
•
Secondary
•
Quaternary
•
Tertiary
20
Which of the following is a function of the mitochondria?
•
To transfer genetic information to new cells
•
To digest unwanted materials
•
To produce energy rich molecules
•
To help transport material into the cell
21
How many turns of the Krebs cycle are required to break down one molecule of glucose?
•
Three
•
Four
•
One
•
Two
22
When solute concentration is equal inside and outside of a cell, it is __________.
•
hypertonic
•
isotonic
•
selectively permeable
•
hypotonic
23
Which of the following statements is true?
•
Eukaryotic cells don't have a nucleus but often have a flagella.
•
All cells are made up of smaller cells.
•
Prokaryotic cells don't have a nucleus, but they still have a plasma membrane that separates their DNA from their cytoplasm.
•
In all cells, the plasma membrane controls what enters and exits.
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