- The bonding of a glucose molecule and a maltose molecule would result in a
Your answer:
polysaccharide
disaccharide
triglyceride
phospholipid
- The hydrolysis of which of the following substances will produce the greatest number of glucose molecules?
Your answer:
Sucrose
Maltose
A disaccharide
A polysaccharide
- The major component of a plant cell wall is a product formed from the dehydration synthesis of
Your answer:
fatty acids
nucleotides
amino acids
monosaccharides
- The main difference between cellulose and starch molecules is
Your answer:
the type of monosaccharide used to form these polymers.
that only starch is made from glucose building blocks.
the type of linkage between glucose subunits.
that only cellulose contains ribose building blocks.
- 10. How many double bonds are there between carbon atoms in a saturated fatty acid?
Your answer:
zero
2
1
more than 2
- A characteristic of unsaturated fats is that they
Your answer:
are made up of amino acids and glycerol.
have double bonds in their carbon chains.
are made up of glucose and fructose.
denature as they cool.
- Which of the following are components of a phospholipid?
Your answer:
cholesterol, glycerol, fatty acids
phosphate group, cholesterol, monosaccharides
fatty acids, phosphate group, glycerol
glycerol, amino acids, phosphate group
- Compared to saturated fats, unsaturated fats contain less
Your answer:
oxygen
hydrogen
fatty acids
glycerol
- A lipid molecule is produced when
Your answer:
amino acids bond to glycerol.
monosaccharides bond to glycogen.
fatty acids bond to glycerol.
dehydration occurs between fatty acids and glycogen.
- Lipids are composed of
Your answer:
nucleotides.
amino acids.
monosaccharides.
glycerol and fatty acids.
- The carbon chain of a saturated fatty acid
Your answer:
has a repeating backbone of sugars and phosphates.
has no double bonds.
is the basis of the ATP molecule.
forms hydrogen bonds with itself.
- An unsaturated fat could be changed into a saturated fat if
Your answer:
glycerol molecules were added.
hydrogen atoms were added.
fatty acid chains were shortened.
peptide bonds were broken.
- Fatty acids containing double bonds are found in
Your answer:
proteins
polysaccharides
unsaturated lipids.
saturated lipids
- Which of the following types of bonding occurs during complementary base pairing?
Your answer:
covalent
peptide
ionic
hydrogen
- Nucleic acids are composed of
Your answer:
enzymes
glucose
fatty acids
nucleotides
- Energy released from the breakdown of monosaccharides in the cytoplasm is stored in
Your answer:
DNA
ATP
ADH
RNA
- Which of the following is not a part of a nucleotide?
Your answer:
Nitrogen base
Sugar
Phosphate
Glycerol
- Which of the following is composed of nucleotides?
Your answer:
Protein
RNA
Starch
Fat
- In the human body, steroid molecules can act as
Your answer:
buffers
hormones
coenzymes
vacuoles
- Which of the following represents the structure of a nucleotide?
Your answer:
Glucose – glucose – glucose.
Amino acid – amino acid – amino acid.
Phosphate – sugar – nitrogenous base.
Salt – lipid – base.
- Which of the following disrupts homeostasis?
Your answer:
Thermoregulation.
Positive feedback.
Cellular respiration.
Pressure filtration.
- Which of the following is an example of negative feedback?
Your answer:
The thermostat shuts off the furnace as the room temperature reaches 20 ° C.
Turning up a dial on the oven increases the temperature.
Flipping a switch turns on a light.
Turning on the lights increases the rate of plant growth.
- A substance which helps maintain a constant pH in a solution is a(n)
Your answer:
salt
base
buffer
acid
- The maintenance of a constant pH of the blood is achieved by
Your answer:
acids
bases
water
buffers
- A substance that combines with excess hydrogen or hydroxide ions in a solution is called
Your answer:
a buffer.
a base.
an acid.
a salt.
- The chemical reactions in the small intestine take place in a basic (alkaline) environment. Which number indicates this basic pH?
Your answer:
8.5
2.5
6.9
4.6
- Some biologically-important molecules dissolve easily in water because the water molecule is
Your answer:
organic
polar
a polymer
saturated
- Which of the following describes hydrolysis?
Your answer:
Making a polymer by removing water.
Making water by combining an acid and a base.
Adding water to break a polymer into unit molecules.
Taking up excess hydroxide ions.
- Which substance is produced in every dehydration synthesis reaction? A. . B. . C. . D. .
Your answer:
Fat
Water
Carbohydrate
Protein
- Synthesis of protein involves the bonding of amino acids to
Your answer:
glucose
fatty acids
peptides
glycerol
- Which of the following is an example of denaturation?
Your answer:
Butter changing from a solid to a liquid.
Sugar dissolving in water.
Water freezing.
Egg white forming a solid when heated.
- A radioactive element is sometimes used to trace the pathway of chemical reactions in the cell. If newly synthesized proteins are radioactive, the radioactive element used could be
Your answer:
nitrogen
sodium
chlorine
potassium
- Proteins act as: 1. Catalysts. 2. Building blocks of DNA. 3. Structural components of cell membrane. 4. Main source of energy in cellular respiration.
Your answer:
2 and 3.
3 and 4.
1 and 2.
1 and 3.
- What is the ratio of hydrogen to oxygen molecules in a carbohydrate?
Your answer:
1:2
2:1
3:1
1:1
- The bonding of unit molecules to produce a polysaccharide is called
Your answer:
hydrolysis.
translation.
dehydration synthesis.
cellular respiration.
- Which of the following is made up of glucose molecules?
Your answer:
Fats
Proteins
Cellulose
DNA
- An increase in thyroxin will have which of the following effects?
Your answer:
increased glycogen production
decreased rate of glucose metabolism
decreased rate of ATP production
increased CO 2 production
- 4. Which of the following is a polymer?
Your answer:
Cellulose
ATP
Glycerol
Glucose
- Increased levels of thyroxin in the blood result in decreased levels of TSH. This is an example of
Your answer:
negative feedback
positive feedback.
active transport.
diffusion.