WGU Heredity and Genetics Review
Questions Solved Correctly.
Organisms require ___ and nutrients to maintain themselves, grow, and reproduce. - Answer energy
Organisms require energy and ___ to maintain themselves, grow, and reproduce. - Answer nutrients
T/F: All ions are atoms - Answer True
T/F: Free radicals are dangerous because they emit energy. - Answer False
T/F: Hydrogen ions are indicated by a pH scale. - Answer True
T/F: Hydrogen ions are in blood. - Answer True
A ___ can help keep the pH of a solution stable. - Answer buffer
Organic molecules consist mainly of ___ atoms. - Answer carbon and hydrogen
___ groups are the "acid" part of amino acids and fatty acids. - Answer carboxyl (-COOH)
T/F: Glucose is a simple sugar. - Answer True
T/F: Sucrose is a simple sugar. - Answer False
T/F: Ribose is a simple sugar. - Answer True
Steroids are among the lipids with no ___. - Answer fatty acid tails
,___ is a type of carbohydrate that can be built using only glucose monomers. - Answer starch
___ is a type of carbohydrate that can be built using only glucose monomers. - Answer cellulose
___ is a type of carbohydrate that can be built using only glucose monomers. - Answer glycogen
A denatured protein has lost its ___. - Answer hydrogen bonds
A denatured protein has lost its ___. - Answer function
NH₂ - CH₂ - COOH - Answer amino acid
C₆H₁₂O₆ - Answer carbohydrate
(methionine)₂₀ - Answer polypeptide
CH₃(CH₂)₁₆COOH - Answer fatty acid
Glycoprotein is made up of ___. - Answer amino acids and sugars
Fat is made up of ___. - Answer glycerol and fatty acids
Wax is made up of ___. - Answer fatty acids and carbon rings
Lipoprotein is made up of ___. - Answer lipids and amino acids
Sucrose is made up of ___. - Answer glucose and fructose
, Glycogen is made up of ___. - Answer glucose
This lipid consists of two fatty acid tails bonded to a phosphate group. - Answer phospholipid
This lipid consists of one, two, or three fatty acid tails bonded to a glycerol head. - Answer fat
In a protein, ___ bonds hold the amino acids together. - Answer peptide
An -OH group is a(n) ___ group. - Answer hydroxyl
An -NH₂ group is a(n) ___ group. - Answer amine
A wild-type fruit fly that is heterozygous for both body color and eye color is mated with a fly exhibiting
two recessive mutations, ebony body and sepia eyes. The offspring were mostly wild/wild or
ebony/sepia, with fewer wild/sepia or ebony/wild. Distribution was roughly the same for each sex. Based
on the data, genes for ebony body and sepia eyes in fruit flies are most likely ___. - Answer linked
What provides the immediate source of energy to establish the proton (H⁺) concentration gradient
across the inner membrane of mitochondria during aerobic respiration? - Answer Oxidation-reduction
reactions as electrons are passed sequentially along members of the electron transport chain.
What pair of scientists used bacteriophages, which are composed of only DNA and protein, to
demonstrate that DNA is the heritable macromolecule that carries genetic information? - Answer
Alfred Hershey and Martha Chase
What structure pumps blood out of the mammalian heart? - Answer ventricle
In the blood and tissue fluids, cholesterol is typically found in complexes with low-density lipoproteins
(LDLs). Cells take up cholesterol when LDL receptors in the plasma membrane bind to the circulating
cholesterol-LDL complexes. Cells do not take up cholesterol when there is an excess of free intracellular
cholesterol. What is an example of a negative feedback mechanism by which cells can regulate the
concentration of intracellular cholesterol? - Answer When there is an excess of intracellular cholesterol,
cells do not transcribe the gene encoding the LDL receptor.
Questions Solved Correctly.
Organisms require ___ and nutrients to maintain themselves, grow, and reproduce. - Answer energy
Organisms require energy and ___ to maintain themselves, grow, and reproduce. - Answer nutrients
T/F: All ions are atoms - Answer True
T/F: Free radicals are dangerous because they emit energy. - Answer False
T/F: Hydrogen ions are indicated by a pH scale. - Answer True
T/F: Hydrogen ions are in blood. - Answer True
A ___ can help keep the pH of a solution stable. - Answer buffer
Organic molecules consist mainly of ___ atoms. - Answer carbon and hydrogen
___ groups are the "acid" part of amino acids and fatty acids. - Answer carboxyl (-COOH)
T/F: Glucose is a simple sugar. - Answer True
T/F: Sucrose is a simple sugar. - Answer False
T/F: Ribose is a simple sugar. - Answer True
Steroids are among the lipids with no ___. - Answer fatty acid tails
,___ is a type of carbohydrate that can be built using only glucose monomers. - Answer starch
___ is a type of carbohydrate that can be built using only glucose monomers. - Answer cellulose
___ is a type of carbohydrate that can be built using only glucose monomers. - Answer glycogen
A denatured protein has lost its ___. - Answer hydrogen bonds
A denatured protein has lost its ___. - Answer function
NH₂ - CH₂ - COOH - Answer amino acid
C₆H₁₂O₆ - Answer carbohydrate
(methionine)₂₀ - Answer polypeptide
CH₃(CH₂)₁₆COOH - Answer fatty acid
Glycoprotein is made up of ___. - Answer amino acids and sugars
Fat is made up of ___. - Answer glycerol and fatty acids
Wax is made up of ___. - Answer fatty acids and carbon rings
Lipoprotein is made up of ___. - Answer lipids and amino acids
Sucrose is made up of ___. - Answer glucose and fructose
, Glycogen is made up of ___. - Answer glucose
This lipid consists of two fatty acid tails bonded to a phosphate group. - Answer phospholipid
This lipid consists of one, two, or three fatty acid tails bonded to a glycerol head. - Answer fat
In a protein, ___ bonds hold the amino acids together. - Answer peptide
An -OH group is a(n) ___ group. - Answer hydroxyl
An -NH₂ group is a(n) ___ group. - Answer amine
A wild-type fruit fly that is heterozygous for both body color and eye color is mated with a fly exhibiting
two recessive mutations, ebony body and sepia eyes. The offspring were mostly wild/wild or
ebony/sepia, with fewer wild/sepia or ebony/wild. Distribution was roughly the same for each sex. Based
on the data, genes for ebony body and sepia eyes in fruit flies are most likely ___. - Answer linked
What provides the immediate source of energy to establish the proton (H⁺) concentration gradient
across the inner membrane of mitochondria during aerobic respiration? - Answer Oxidation-reduction
reactions as electrons are passed sequentially along members of the electron transport chain.
What pair of scientists used bacteriophages, which are composed of only DNA and protein, to
demonstrate that DNA is the heritable macromolecule that carries genetic information? - Answer
Alfred Hershey and Martha Chase
What structure pumps blood out of the mammalian heart? - Answer ventricle
In the blood and tissue fluids, cholesterol is typically found in complexes with low-density lipoproteins
(LDLs). Cells take up cholesterol when LDL receptors in the plasma membrane bind to the circulating
cholesterol-LDL complexes. Cells do not take up cholesterol when there is an excess of free intracellular
cholesterol. What is an example of a negative feedback mechanism by which cells can regulate the
concentration of intracellular cholesterol? - Answer When there is an excess of intracellular cholesterol,
cells do not transcribe the gene encoding the LDL receptor.
