Bio 1330: Exam 3 Functional Bio 1330
Test Questions All Answered Correct
Rated A+.
What is the difference between a chromatid and a chromosome? - Answer A. chromatid is
one half of a replicated chromosome, whereas a chromosome consist of DNA wrapped around
proteins in a highly organized manner
A group of cells is assayed for DNA content immediately following mitosis and is found to have
an average of 8 picograms of DNA per nucleus. How many picograms would be found at the end
of S and at the end of G2? - Answer 16;16
Which event makes meiosis a reductional division and why? - Answer Separation of
homologs in meiosis I, because it produces 2 haploid (n) daughter cells from a single diploid (2n)
parent cell
Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early
embryo with how many cells? - Answer 32
During DNA replication, the _______ is synthesized continuously, while the ______ is
synthesized in pieces and linked by a ligase later on. - Answer leading strand ; lagging
Which enzyme is incorrectly paired with its function - Answer DNA ligase-joins okazaki
fragments
Which of the following would you expect of a eukaryote lacking telomerase? - Answer a
reduction in chromosome length in gametes
E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two
more generations (two rounds of DNA replication). DNA extracted from these cells is
centrifuged. What density distribution of DNA would you expect in this experiment? - Answer
one low density and one intermediate density band
in the central dogma of life the order of flow of information is? - Answer DNA to RNA to
Protein
There are sixty-one mRNA codons that specify an amino acid, but only forty-five tRNAs. This is
best explained by the fact that _____. - Answer the rules for base pairing between the third
base of a codon and a tRNA are flexible
, For a science fair project, two students decided to repeat the Hershey and Chase experiment,
with modifications. They decided to label the nitrogen of the DNA, rather than the phosphate.
They reasoned that each nucleotide has only one phosphate and two to five nitrogens. Thus,
labeling the nitrogens would provide a stronger signal than labeling the phosphates. Why won't
this experiment work? - Answer amino acids (and thus proteins) also have nitrogen atoms;
thus, the radioactivity would not distinguish between DNA and proteins
Okazaki fragments are produced during DNA replication because - Answer DNA polymerase
can add nucleotides only to the 3' end of the growing strand
Which of the following process is central to the initiation of transcription in bacteria? - Answer
binding of sigma to the promoter region
which of the following occurs in prokaryotes but not in eukaryotes? - Answer concurrent
transcription and translation
Prophase - Answer Chromosomes become visable, nuclear envelop dissolves, spindle forms
Mitosis - Answer cell division in which the nucleus divides into nuclei containing the same
number of chromosomes
Anti-codon - Answer group of three bases on a tRNA molecule that are complementary to an
mRNA codon
Gene - Answer a segment of DNA on a chromosome that codes for a specific trait
Cytokinesis - Answer division of the cytoplasm to form two separate daughter cells
somatic cells - Answer 2 chromosomes of each type, have a diploid number of chromosmes
Central Dogma - Answer theory that states that, in cells, information only flows from DNA to
RNA to proteins: exception RNA to DNA to RNA to Protein through reverse transcription
silent mutation - Answer A mutation that changes a single nucleotide, but does not change
the amino acid created.
G2 phase - Answer The second gap, or growth phase, of the cell cycle, consisting of the
portion of interphase after DNA synthesis occurs.
Test Questions All Answered Correct
Rated A+.
What is the difference between a chromatid and a chromosome? - Answer A. chromatid is
one half of a replicated chromosome, whereas a chromosome consist of DNA wrapped around
proteins in a highly organized manner
A group of cells is assayed for DNA content immediately following mitosis and is found to have
an average of 8 picograms of DNA per nucleus. How many picograms would be found at the end
of S and at the end of G2? - Answer 16;16
Which event makes meiosis a reductional division and why? - Answer Separation of
homologs in meiosis I, because it produces 2 haploid (n) daughter cells from a single diploid (2n)
parent cell
Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early
embryo with how many cells? - Answer 32
During DNA replication, the _______ is synthesized continuously, while the ______ is
synthesized in pieces and linked by a ligase later on. - Answer leading strand ; lagging
Which enzyme is incorrectly paired with its function - Answer DNA ligase-joins okazaki
fragments
Which of the following would you expect of a eukaryote lacking telomerase? - Answer a
reduction in chromosome length in gametes
E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two
more generations (two rounds of DNA replication). DNA extracted from these cells is
centrifuged. What density distribution of DNA would you expect in this experiment? - Answer
one low density and one intermediate density band
in the central dogma of life the order of flow of information is? - Answer DNA to RNA to
Protein
There are sixty-one mRNA codons that specify an amino acid, but only forty-five tRNAs. This is
best explained by the fact that _____. - Answer the rules for base pairing between the third
base of a codon and a tRNA are flexible
, For a science fair project, two students decided to repeat the Hershey and Chase experiment,
with modifications. They decided to label the nitrogen of the DNA, rather than the phosphate.
They reasoned that each nucleotide has only one phosphate and two to five nitrogens. Thus,
labeling the nitrogens would provide a stronger signal than labeling the phosphates. Why won't
this experiment work? - Answer amino acids (and thus proteins) also have nitrogen atoms;
thus, the radioactivity would not distinguish between DNA and proteins
Okazaki fragments are produced during DNA replication because - Answer DNA polymerase
can add nucleotides only to the 3' end of the growing strand
Which of the following process is central to the initiation of transcription in bacteria? - Answer
binding of sigma to the promoter region
which of the following occurs in prokaryotes but not in eukaryotes? - Answer concurrent
transcription and translation
Prophase - Answer Chromosomes become visable, nuclear envelop dissolves, spindle forms
Mitosis - Answer cell division in which the nucleus divides into nuclei containing the same
number of chromosomes
Anti-codon - Answer group of three bases on a tRNA molecule that are complementary to an
mRNA codon
Gene - Answer a segment of DNA on a chromosome that codes for a specific trait
Cytokinesis - Answer division of the cytoplasm to form two separate daughter cells
somatic cells - Answer 2 chromosomes of each type, have a diploid number of chromosmes
Central Dogma - Answer theory that states that, in cells, information only flows from DNA to
RNA to proteins: exception RNA to DNA to RNA to Protein through reverse transcription
silent mutation - Answer A mutation that changes a single nucleotide, but does not change
the amino acid created.
G2 phase - Answer The second gap, or growth phase, of the cell cycle, consisting of the
portion of interphase after DNA synthesis occurs.
