Both enzymatic and G protein-coupled receptors are able to activate other enzymes inside the cell
Definition
True
Term
Which of the following is often associated with amplification cascades?
Protein kinases,All of these, G-protein coupled receptors, Cyclic AMP (cAMP)
Definition
C)
Term
The class of signal receptors called "enzymatic receptors" usually are protein kinases, which activate other proteins by adding a phosphate group to them
Definition
A)
Term
Peptide hormones tend to be able to diffuse through a cell's plasma membrane and induce formation of intracellular receptors
Definition
B)
Term
Steroid hormones induce cellular activity by binding to a membrane-bound receptor, and triggering activity of G-proteins inside of cells.)
Definition
)
Term
G proteins exist outside of cells, and can induce activity of other proteins inside of cells.
Definition
B)
Term
Conduction of a neural impulse from one neuron to another usually occurs by which of the following?
Definition
C)
Term
Protein kinases are enzymes that activate other enzymes by adding a phosphate group to the inactive enzyme
Definition
A)
Term
Which of the following is a class of enzymes that removes a phosphate group from an enyme?
Enzymatic receptor, Kinase, All of these,
Definition
E)
Term
Epidermal growth factor is a molecule that binds to a specific receptor on epidermal cells, and helps initiate the process of cell division
Definition
Term
Sister chromatids carry the same general genetic information, but are not identical to each other
Definition
Term
During metaphase of mitosis, homologous chromosomes pair up at the middle of the cell
Definition
False
Term
In adults, mitosis of all tissues stops, because the body has all the cells it will ever need
Definition
False
Term
Humans possess 22 pairs of autosomes, and one pair of sex chromosomes
Definition
Term
The interphase stage of the cell cycle is a very short period of time when the cell is preparing to divide
Definition
False
Term
Which is the best description of metaphase of mitosis
DNA is being duplicated
Duplicated chromosomes align at the midline of the cell
Sister chromatids separate from each other
Sister chromatids are separted from each other
Definition
C)
Term
The term "diploid" refers to a cell that contains two copies of each chromosome type
Definition
A)
Term
Which of the following occurs during anaphase of mitosis?
Each homolog finds its partner and duplicates its DNA
C) D) E)
Definition
B)
Term
At which stage of mitosis are sister chromatids the farthest apart?
B) C) D) E)
Definition
B)
Term
Which of the following occurs during the S phase of the cell cycle?
A) B) C) D) E)
Definition
C)
Term
Mitosis is a form of cell division that results in daughter cells that are identical to the original cell
Definition
A)
Term
If a single mutation occurs in a cell's DNA, the cell will begin dividing uncontrollably and cause cancer
Definition
B)
Term
An individual is born an albino, but both parents had normal coloration. What do we know about the parents?
A) B) C) D) E)
Definition
C)
Term
An individual is termed "homozygous" when it has two copies of the same allele for a particular locus
Definition
A)
Term
Mendel's Theory of Segregation states that two alleles of one locus separate randomly in meiosis, ending up in different gametes
Definition
A)
Term
What is the chance a couple will have a baby affected by a recessive trait, if each parent is a "carrier"?
A) B) C) D) E)
Definition
A)
Term
Mendel's Theory of independent assortment says that two alleles at one locus separate from each other in meiosis, independent of the separation of alleles on other homologous pairs of chromosomes
Definition
A)
Term
A pointed hairline called widow's peak is a relatively rare trait; it therefore must be the result of a recessive allele
Definition
B)
Term
A diploid individual should possess two copies of every gene locus
Definition
true
Term
Because the two alleles for flower color in snapdragons show "incomplete dominance" it should be possible to generate a true-breeding line of pink snapdragons
Definition
B)
Term
The definition of heterozygous is possession of two different gene loci that contribute to a single physical trait.
Definition
B)
Term
A diploid individual contains two copies of every possible allele that for every gene locus
Definition
B)
Term
A heterozygous individual has two different alleles at a specific gene locus
Definition
A)
Term
A diploid individual should possess two copies of every gene locus
Definition
A)
Term
An individual is termed "homozygous" when it has two copies of the same allele for a particular locus
Definition
A)
Term
One of Gregor Mendel's most important contributions to genetics was his mathematical analysis of breeding experiments, which allowed him to conclude that genetic traits are inherited as "particles" of information.
Definition
A)
Term
During anaphase of meiosis I, sister chromatids are separated from each other
Definition
Term
Homologous pairs of chromosomes carry genetic information for the same traits, but may contain different versions of the same gene loci
Definition
Term
During which stage of meiosis do sister chromatids separate from each other?
A) B) C) D) E)
Definition
E)
Term
Homologous chromosomes are always identical to each other
Definition
Term
During anaphase of the second meiotic division,homologs are separated from each other but sister chromatids remain attached at their centromeres
Definition
A)
Term
The first metaphase stage of meiosis is distinct from metaphase of mitosis because during metaphase of meiosis homologs are paired, but during mitosis they are not
Definition
A)
Term
Haploid cells have only one copy of each gene locus, and diploid cells should contain two copies of each locus
Definition
A)
Term
During prophase I of meiosis, homologs pair together and may exchange genetic information; this pairing and exchange does not occur during mitosis
Definition
True
Term
Genetic variation may be generated by the exchange of genetic information between sister chromatids during meiosis.
