Chapter 3 test Biology
Which of the following statements about dehydration synthesis is false?
Animal digestive systems utilize this process to break down food.
The molecular formula of most monosaccharides represents a multiple of what ratio...
CH2O
Which of the following lists contains only polysaccharides?
Cellulose, starch, glycogen
True of false? Lipids are soluble in water.
False
What feature of fats makes them hydrophobic?
Fats have non-polar hydrocarbon chains
Which of the following statements about hydrocarbons is false?
Hydrocarbons are inorganic compounds
How are genes used by cells to build proteins?
The genes in DNA direct the synthesis of an RNA molecule, which is used to build a protein
What hypothesis is most likely to be productive for their initial investigation about why the wash enzymes didn't perform?
The three dimensional structure of the proteins may have been altered.
Which of the following statements regarding triglyceride molecules is false?
Triglycerides are hydrophilic
Organic compounds
always contain carbon
Glucose molecules are to starch as ____ are to protiens
amino acids
Which of the following contains a carboxyl and an amino group?
amino acids
How are these two amino acids attached together?
amino group to carboxylic acid group
Which of the following is an example of secondary structure in a protein?
an alpha helix
Which of the following is an organic molecule?
carbohydrates
which of the following statements regarding carbon is false?
carbon has the ability to bond with up to six other atoms
The carbohydrate that provides support in plants is called
cellulose
A hydroxyl group is
characteristic of alcohols
DNA differs from RNA because DNA
contains thymine in the place of uracil
A disaccharide forms when two monosaccharides join by ?
dehydration synthesis.
Single sugars, called monosaccharides supply____ to a cell
energy
Which of the following would be correctly classified as a protein?
enzymes
Solid triglycerides are known as
fats
The storage form of carbohydrates is ____ in animals and _____ in plants
glycogen and starch
What elements make up a carbohydrate?
hydrogen, oxygen, carbon
Glycogen, a polysaccharide, in your liver may be broken down to glucose by the process of
hydrolysis
The results of dehydration synthesis can be reversed by
hydrolysis
Peptide bonds
link amino acids
Fatty acids with double bonds between some of their carbons are said to be?
unsaturated
Which class of fatty acids contains double bonds?
unsaturated
Which of the following statements about the monomers and polymers found in living organisms is false?
monomers are joined together by the process known as hydrolysis.
The three types of carbohydrates are
monosaccharide, polysaccharide, disaccharide
Cellulose differs from starch in that
most animals cannot break down cellulose, but they can easily digest starch
Liquid triglycerides are known as
oils
A phospholipid is composed of
one glycerol molecule linked to one phosphate group and two fatty acids
A major type of lipid found in cell membranes is
phospholipids
A molecule with the formula C55H110O55 is probably a...
polysaccharide
Large molecules that form when many monosaccharides bonded together are
polysaccharides
A protein containing more than one polypeptide chain exhibits the ____ level of protein structure
quaternary
Which of the following substances is a lipid
steroids
Lipids have to functions: shape cell membranes and
store energy
Carbohydrates and lipids have many carbon-hydrogen bonds; therefore they both
store energy in these bonds
Which of the following in a carbohydrate?
sucrose
The primary structure of a protein is
the amino acid sequence of the polypeptide chain
Amino acids can be distinguished from one another by
the chemical properties of their R groups
These two molecules are structures isomers. What is the difference between them?
the location of a double-bonded oxygen atom
Which of the following characteristics of protein will remain intact if the protein is denatured?
the number of amino acids in the protein
The tertiary structure of a polypeptide refers to
the overall three dimensional structure
Propanol and isopropanol are isomers. This means they have
the same molecular formula, but different chemical properties
Proteins differ from one another because
the sequence of amino acids in the polypeptide chain differs from protein to protein
Based on your understanding of the enzyme structure, which of the following would you recommend that they also investigate?
the temperature of the liquid of the washing vat
One functions of a carbohydrate is
to provide the body with immediate energy
unsaturated fatty acids must contain at least ____ double bonds
1
Triglycerides form from the bonding of ___ fatty acids to glycerol.
3
What is the general function of enzymes within a cell?
****TO SPEED UP CHEMICAL REACTIONS*****
Which of the following is a carboxyl group?
-COOH
Which of the following is a amino group?
-NH2
Many names for sugars end in the suffix
-ose
Which of the following statements about animal cell lipids is false?
Many lipids function as enzymes
Are lipids polymers like carbohydrates
NO
Which of the following statements regarding nucleotides is false?
Nucleotides contain lipids