BIOLOGY 151- EXAM 2 QUESTIONS AND
REVIEW WITH CORRECT ANSWERS
large numbers of ribosomes are present in cells that produce what molecule? - Correct
Answers -proteins
which of the statements about synthesis of polypeptides is incorrect? - Correct Answers
-the synthesis of proteins is a catabolic process
which of the follow is not a constituent of the nucleus? - Correct Answers -ribosomes
tissues that are metabolically active and utilize large amounts of energy would be rich in
- Correct Answers -mitochondria
which of the following is important for allowing large, charged molecules to pass through
the membrane? - Correct Answers -membrane proteins
which of the following statements is not correct about active transport? - Correct
Answers -it uses membrane proteins to allow molecules to move from a region of higher
concentration to one of lower concentration
nucleolus - Correct Answers -synthesizes ribosomes
transcription - Correct Answers -copy DNA into RNA
mRNA - Correct Answers -carries message from DNa to ribosomes to make proteins
mitochondria - Correct Answers -powerhouse- make ATP
ribosomes - Correct Answers -protein synthesis (translation location)
nucleus - Correct Answers -store DNA
which of the following statements about plasma membranes is incorrect? - Correct
Answers -they are relatively rigid structures
of the following molecules, which passes through a lipid bilayer most readily? - Correct
Answers -carbon dioxide
, which of the following is not true of passive diffusion? - Correct Answers -passive
diffusion requires the presence of lipids in the membrane to assist charged molecules in
passing through the membrane
the release of insulin from pancreatic cells occurs by - Correct Answers -exocytosis
facilitated diffusion across a biological membrane requires __ and moves a substance
__ its concentration gradient - Correct Answers -transport proteins...down/with
the idea that all living things are composed of cells that all come from pre-existing cells
defines - Correct Answers -cell theory
suppose two compartments within a cell are separated by a semipermeable membrane.
compartment A has a higher solute concentration than compartment B. Compartment A
is __ to compartment B, and water will move via osmosis into __ - Correct Answers -
hypertonic; compartment A
as cell size increases, the - Correct Answers -volume increases faster than the surface
area
true or false: muscle cells make different proteins than nerve cells because they have
different sequences of DNA - Correct Answers -false
which tye of protein does DNA wrap around so that it can be packaged in a cell? -
Correct Answers -histones
which one of the following correctly lists the components necessary for eukaryotic
transcription? - Correct Answers -RNA polymerase, general transcription factors, DNA
and RNA nucleotides
a template DNA strand contains the sequence 5' ATGCTGAC 3' - Correct Answers -5'
GUCAGCAU 3'
which of the following molecules is made during the process of transcription?
a. mRNA
b. tRNA
c. rRNA - Correct Answers -all are correct
in transcription, the energy to attach each suscessive ribonucleotide to the growing RNA
chain comes from: - Correct Answers -cleavage of the high-energy phosphate bonds of
the incoming nucleotide
a template DNA strand contains the sequence 3' ATGCTGAC 5' this strand is
transcribed: - Correct Answers -from left to right
REVIEW WITH CORRECT ANSWERS
large numbers of ribosomes are present in cells that produce what molecule? - Correct
Answers -proteins
which of the statements about synthesis of polypeptides is incorrect? - Correct Answers
-the synthesis of proteins is a catabolic process
which of the follow is not a constituent of the nucleus? - Correct Answers -ribosomes
tissues that are metabolically active and utilize large amounts of energy would be rich in
- Correct Answers -mitochondria
which of the following is important for allowing large, charged molecules to pass through
the membrane? - Correct Answers -membrane proteins
which of the following statements is not correct about active transport? - Correct
Answers -it uses membrane proteins to allow molecules to move from a region of higher
concentration to one of lower concentration
nucleolus - Correct Answers -synthesizes ribosomes
transcription - Correct Answers -copy DNA into RNA
mRNA - Correct Answers -carries message from DNa to ribosomes to make proteins
mitochondria - Correct Answers -powerhouse- make ATP
ribosomes - Correct Answers -protein synthesis (translation location)
nucleus - Correct Answers -store DNA
which of the following statements about plasma membranes is incorrect? - Correct
Answers -they are relatively rigid structures
of the following molecules, which passes through a lipid bilayer most readily? - Correct
Answers -carbon dioxide
, which of the following is not true of passive diffusion? - Correct Answers -passive
diffusion requires the presence of lipids in the membrane to assist charged molecules in
passing through the membrane
the release of insulin from pancreatic cells occurs by - Correct Answers -exocytosis
facilitated diffusion across a biological membrane requires __ and moves a substance
__ its concentration gradient - Correct Answers -transport proteins...down/with
the idea that all living things are composed of cells that all come from pre-existing cells
defines - Correct Answers -cell theory
suppose two compartments within a cell are separated by a semipermeable membrane.
compartment A has a higher solute concentration than compartment B. Compartment A
is __ to compartment B, and water will move via osmosis into __ - Correct Answers -
hypertonic; compartment A
as cell size increases, the - Correct Answers -volume increases faster than the surface
area
true or false: muscle cells make different proteins than nerve cells because they have
different sequences of DNA - Correct Answers -false
which tye of protein does DNA wrap around so that it can be packaged in a cell? -
Correct Answers -histones
which one of the following correctly lists the components necessary for eukaryotic
transcription? - Correct Answers -RNA polymerase, general transcription factors, DNA
and RNA nucleotides
a template DNA strand contains the sequence 5' ATGCTGAC 3' - Correct Answers -5'
GUCAGCAU 3'
which of the following molecules is made during the process of transcription?
a. mRNA
b. tRNA
c. rRNA - Correct Answers -all are correct
in transcription, the energy to attach each suscessive ribonucleotide to the growing RNA
chain comes from: - Correct Answers -cleavage of the high-energy phosphate bonds of
the incoming nucleotide
a template DNA strand contains the sequence 3' ATGCTGAC 5' this strand is
transcribed: - Correct Answers -from left to right
