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bio 110

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Which of the following correctly matches an organic molecule with how plants use it?
Select one:
a. glucose travels in vessels called phloem
b. cellulose is stored for times when a plant requires energy
c. cholesterol is embedded in the cell membranes for strength
d. phospholipids form the plant's cell membranes
phospholipids form the plant's cell membranes
RNA and DNA are information molecules. In what portion of their molecular structures does this coding information reside?
Select one:
a. the sugars
b. the phosphate groups
c. the hydrogen bonds
d. the bases: A, T, C, G, U
the bases: A, T, C, G, U
Metabolism is best defined as
Select one:
a. the number of calories an organism consumes
b. the number of calories consumed times the organism's weight
c. the total number of cells that comprise an organism
d. all the chemical reactions needed to keep an organism alive
all the chemical reactions needed to keep an organism alive
Why are there a large number of mitochondria in your skeletal muscle cells?
Select one:
a. mitochondria are control centers directing the movement of skeletal muscles
b. mitochondria store energy
c. mitochondria produce the ATP needed to phosphorylate contractile proteins such as actin
d. mitochondria fight foreign invaders
mitochondria produce the ATP needed to
Polymers are large organic molecules. All of the following statements regarding polymers is true, EXCEPT
Select one:
a. Polysaccharides are composed of monosaccharide monomers.
b. Proteins are composed of amino acid monomers.
c. Nucleic acids are composed of nucleotide monomers.
d. Steroids are composed of cholesterol monomers.
Steroids are composed of cholesterol monomers.
Cooking an egg irreversibly disables its proteins because their shape is altered. This alteration is called
Select one:
a. dehydration synthesis
b. denaturation
c. decomposition
d. crystallization
b
Which of the following correctly describes how your body uses these carbohydrate molecules?
Select one:
a. cellulose is an important component of your cell membranes
b. glycogen is stored in adipose cells
c. starch is stored in your muscle cells
d. glucose circulates in your blood so it can be delivered to your cells
glucose circulates in your blood so it can be delivered to your cells
Which of the following correctly describes how your body uses these carbohydrate molecules?
Select one:
a. cellulose is an important component of your cell membranes
b. glycogen is stored in adipose cells
c. starch is stored in your muscle cells
d. glucose circulates in your blood so it can be delivered to your cells
glucose circulates in your blood so it can be delivered to your cells
All of the following are needed to accomplish aerobic cellular respiration in your cells, except
Select one:
a. monomers such as glucose
b. CO2
c. O2
d. ADP
e. mitochondria
CO2
The value of whole grain foods is they have
Select one:
a. have a low glycemic index- not allowing insulin to peak
b. a high glycemic index- not allowing insulin to peak
c. cause blood sugar levels to spike
d. are the main dietary cause of Type II Diabetes
have a low glycemic index- not allowing insulin to peak
The production of wine involves the humans exploitation of ____________ (name of organisms) that are naturally capable of __________ fermentation.
Select one:
a. yogurt, lactic acid
b. bacteria, alcohol
c. yeast, alcohol
d. plants, lactic acid
yeast, alcohol
Correctly identify the gas exchange that occurs across the membranes of your cells every second of your life.
Select one:
a. H2O in ; O2 out
b. O2 out ; CO2 in
c. CO2 in ; H2O out
d. O2 in ; CO2 out
O2 in ; CO2 out
Which of these enzymes would function optimally in the acid environment of the human stomach?

Graph of trypsin and pepsin
Select one:
a. pepsin
b. trypsin
c. both would function equally
d. neither since they would both be destroyed by stomach acids
pepsin
An essential nutrient is defined as a nutrient that
Select one:
a. is required to make ATP
b. cannot be stored in cells for long periods of time- so must be obtained by diet
c. is required to make DNA
d. cannot be synthesized by cells-must be obtained by diet
cannot be synthesized by cells-must be obtained by diet
This chemical equation exemplifies which type of chemical reaction?

glucose + fructose -------> sucrose
Select one:
a. hydrolysis reaction
b. denaturation reaction
c. nitrogenous base reaction
d.dehydration synthesis reaction
dehydration synthesis reaction
All of the following are lipid molecules, except
Select one:
a. phospholipids
b. keratin
c. saturated triglycerides
d. testosterone
keratin
dehydration synthesis of sucrose
Which of the molecules in the equation would have an active site?
Select one:
a. glucose
b. fructose
c. sucrose synthase
d. sucrose
sucrose synthase
Predict the most immediate outcome if monomers are not delivered to your cells
Select one:
a. The cells die
b. ATP cannot be recharged into ADP
c. ADP cannot be recharged into ATP
ADP cannot be recharged into ATP
Phosphorylation describes
Select one:
a. how polypeptides become proteins
b. how molecules are energized to accomplish work in a cell
c. the condition leading to Type II Diabetes
d. why phospholipid molecules have polar heads
Feedback
how molecules are energized to accomplish work in a cell
Many carbohydrate, lipid and protein food molecules can be used for cell energy. Which scenario best summarizes this?
Select one:
a.Food molecules are digested into monomers, travel in the blood and within cells their potential energy is converted into another form of chemical energy, ATP
b. Each group of food molecules have their own unique metabolic pathway (aerobic cellular respiration, lactic acid fermentation or alcohol fermentation) any of which make ATP
c. Most food molecules are structurally similar to glucose therefore they participate in cellular respiration without any chemical modifications required
d. Undigested food molecules are delivered to cells via the blood where the mitochondria convert them to ATP.
Food molecules are digested into monomers, travel in the blood and within cells their potential energy is converted into another form of chemical energy, ATP
Which of the following best describe coronary artery disease?
Select one:
a. proteins are denatured due to hype-rthermic conditions
b. excessive LDL's circulating in the blood can result in plaque formation
c. blood sugar spikes due to a diet comprised primarily of high glycemic index foods
d. lactic acid accumulates because muscle cells do not have oxygen
excessive LDL's circulating in the blood can result in plaque formation
Which of the following cause unsaturated triglycerides to be liquid at room temperature?
Select one:
a. they are composed of simple sugars
b. their fatty acids tails are bend due to double bonds
c. because their fatty acids have been hydrogenated
d. their hydrogen bonds break due to temperature
their fatty acids tails are bend due to double bonds
Within the human body, cholesterol-
Select one:
a. is an important component of cell membranes
b. is needed to synthesize sex hormones
c. circulates in your blood vessels within LDL's and excess can lead to coronary artery disease
d. all of the responses are correct
e. none of the responses are correct
all of the responses are correct
Select the protein molecule that is correctly matched with its function within the human body:
Select one:
a. keratin: regulates blood glucose levels
b. actin: correctly assembles amino acids into polypeptides
c. hemoglobin: transports oxygen within the blood
d. antibodies: enables muscles to contract
hemoglobin: transports oxygen within the blood
When an enzyme (or any protein) is denatured, its
Select one:
a. amino acids reorder themselves
b. covalent bonds are broken
c. change in shape is due to a mutation
d. hydrogen bonds are broken
hydrogen bonds are broken
In this chemical equation, sucrose
sucrose + H20----->glucose + fructose
Select one:
a. can be called either a reactant or a substrate
b. is a product
c. is the enzyme
d. not enough information provided to answer
can be called either a reactant or a substrate