BIOL 1121 - Exam Prep With Complete Solutions
Which of the following proteins appear in some stages of the cell cycle and are
degraded at other stages?
a. kinases
b. cyclins
c. nucleotides
d. phosphatases
e. none of the above - ANSWER b. cyclins
the concentrations of cyclins fluctuate throughout the cell cycle
What is the sequence corresponding to the following electropherogram obtained by
Sanger sequencing (green: A; red:T; black: G; blue: C)?
a. CCGTTATGAAC
b. GGCTTATGAAG
c. CAACTATTGCC
d. GGCAATAGTTG
e. CCGTTATCAAC - ANSWER e. CCGTTATCAAC
The process of _______________ cuts introns from the primary transcript and the final
"processed" mRNA is produced.
a. RNA cleaving
b. RNA translocation
c. RNA elongation
d. RNA splicing - ANSWER d. RNA splicing
,Introns are removed from primary transcripts by cleavage at conserved sequences
called splice sites. These sites are found at the 5′ and 3′ ends of introns.
At which pH will the concentration of hydrogen ions be equal to the concentration of
hydroxide ions?
a. pH 1
b. pH 5
c. pH 7
d. pH 9
e. pH 14 - ANSWER c. pH 7
in a neutral solution the hydrogen ion (H+) and the hydroxyl ion (OH−) concentrations
are equal, and each is equal to 10−7. A pH of 7 is neutral.
G0 is:
a. part of interphase
b. the phase of the cell cycle where DNA replication occurs
c. the phase of the cell cycle where two identical daughter cells are created
d. a special "resting" phase in which cells are in a non cycling state
e. a special phase where the number of chromosomes in a parent cell is reduced by half
such that each daughter cell contains only one member of a pair of homologous
chromosomes - ANSWER d. a special "resting" phase in which cells are in a non cycling
state
, resting phase is a period in the cell cycle in which cells exist in a quiescent state.
Which of the following can be described as 'a sequence that can be several thousand
base pairs upstream or downstream of a eukaryotic promoter and which increases gene
expression as much as 200-fold.'?
a. CAAT box
b. enhancer
c. insulator
d. TATA box - ANSWER b. enhancer
Segment of DNA that is upstream, downstream, perhaps thousands of nucleotides
away, or on another chromosome that influence the transcription of a specific gene
Many of the extracellular signal molecules that regulate inflammation are released
locally at the site of infection. What form of cell-to-cell signaling is being used?
a. endocrine
b. paracrine
c. neuronal
d. contact-dependent - ANSWER b. paracrine
The eicosanoids are rapidly broken down and therefore act locally in autocrine or
paracrine signaling pathways. They stimulate a variety of responses in their target cells,
including blood platelet aggregation, inflammation, and smooth-muscle contraction
Which of the following correctly matches an organelle with its function?
Which of the following proteins appear in some stages of the cell cycle and are
degraded at other stages?
a. kinases
b. cyclins
c. nucleotides
d. phosphatases
e. none of the above - ANSWER b. cyclins
the concentrations of cyclins fluctuate throughout the cell cycle
What is the sequence corresponding to the following electropherogram obtained by
Sanger sequencing (green: A; red:T; black: G; blue: C)?
a. CCGTTATGAAC
b. GGCTTATGAAG
c. CAACTATTGCC
d. GGCAATAGTTG
e. CCGTTATCAAC - ANSWER e. CCGTTATCAAC
The process of _______________ cuts introns from the primary transcript and the final
"processed" mRNA is produced.
a. RNA cleaving
b. RNA translocation
c. RNA elongation
d. RNA splicing - ANSWER d. RNA splicing
,Introns are removed from primary transcripts by cleavage at conserved sequences
called splice sites. These sites are found at the 5′ and 3′ ends of introns.
At which pH will the concentration of hydrogen ions be equal to the concentration of
hydroxide ions?
a. pH 1
b. pH 5
c. pH 7
d. pH 9
e. pH 14 - ANSWER c. pH 7
in a neutral solution the hydrogen ion (H+) and the hydroxyl ion (OH−) concentrations
are equal, and each is equal to 10−7. A pH of 7 is neutral.
G0 is:
a. part of interphase
b. the phase of the cell cycle where DNA replication occurs
c. the phase of the cell cycle where two identical daughter cells are created
d. a special "resting" phase in which cells are in a non cycling state
e. a special phase where the number of chromosomes in a parent cell is reduced by half
such that each daughter cell contains only one member of a pair of homologous
chromosomes - ANSWER d. a special "resting" phase in which cells are in a non cycling
state
, resting phase is a period in the cell cycle in which cells exist in a quiescent state.
Which of the following can be described as 'a sequence that can be several thousand
base pairs upstream or downstream of a eukaryotic promoter and which increases gene
expression as much as 200-fold.'?
a. CAAT box
b. enhancer
c. insulator
d. TATA box - ANSWER b. enhancer
Segment of DNA that is upstream, downstream, perhaps thousands of nucleotides
away, or on another chromosome that influence the transcription of a specific gene
Many of the extracellular signal molecules that regulate inflammation are released
locally at the site of infection. What form of cell-to-cell signaling is being used?
a. endocrine
b. paracrine
c. neuronal
d. contact-dependent - ANSWER b. paracrine
The eicosanoids are rapidly broken down and therefore act locally in autocrine or
paracrine signaling pathways. They stimulate a variety of responses in their target cells,
including blood platelet aggregation, inflammation, and smooth-muscle contraction
Which of the following correctly matches an organelle with its function?
