age 1 of 44
BIO 201 EXAM 2 2025/2026 COMPLETE QUESTIONS
WITH VERIFIED CORRECT SOLUTIONS || 100%
GUARANTEED PASS <LATEST VERSION>
TRANSPORT PROTEINS PROVIDE... .......Answer........."tunnels" for
the movement of ions and hydrophobic molecules across the
phospholipid bilayer
- channel proteins are transmembrane proteins
- form open passageway for facilitated diffusion
- up to 100 million ions may pass/second
- most channels are gated and can close to prohibit diffusion
AQUAPORINS .......Answer.........channels that allow for the faster
movement of water across membranes (facilitated diffusion)
,age 2 of 44
TRANSPORTERS .......Answer.........transmembrane proteins
- bind solutes in hydrophilic pocket + conformational change
results in release on other side
- important for uptake of sugars, amino acids + nucleotides
- 100 to 1000 molecules per second
(facilitated diffusion)
UNIPORTERS .......Answer.........a transporter that carries a single
solute across a cell membrane
primary active transport
SYMPORTERS .......Answer.........drives the active transport of a
molecule by using pre-existing gradient of another
secondary active transport
,age 3 of 44
ANTIPORTERS .......Answer.........drives the transport of once
molecule by using the pre-existing gradient of another
- bulk transport: exocytosis
secondary active transport
The "HD gene" (huntingtin) was discovered in 1993. Did this
discovery lead to a complete understanding of the cause of HD?
.......Answer.........no, because the functions of normal and altered
Huntingtin proteins are still unclear
Dr. Huntington used observations on phenotypes in families to
prove that the illness he studied was a genetic disease
.......Answer.........False
Pedigree analysis involves making diagrams that can be used to
infer hereditary processes. .......Answer.........True
, age 4 of 44
Dr. Wexler's pedigree studies that took place in Venezuela are
best described as association studies .......Answer.........True
The study of "normal" brains and those of Huntington's disease
patients indicated that Huntington's disease causes atrophy of
parts of the brain. .......Answer.........False
Which of the following process(es) is/are involved in how a gene
codes for a protein? .......Answer.........Transcription/Tanslation
Which of the following is a "gene product"? .......Answer.........a
messenger RNA transcribed from a gene /a protein encoded by
a gene
Which of the following statements is correct?
.......Answer.........transcription uses DNA/RNA - none of the above
BIO 201 EXAM 2 2025/2026 COMPLETE QUESTIONS
WITH VERIFIED CORRECT SOLUTIONS || 100%
GUARANTEED PASS <LATEST VERSION>
TRANSPORT PROTEINS PROVIDE... .......Answer........."tunnels" for
the movement of ions and hydrophobic molecules across the
phospholipid bilayer
- channel proteins are transmembrane proteins
- form open passageway for facilitated diffusion
- up to 100 million ions may pass/second
- most channels are gated and can close to prohibit diffusion
AQUAPORINS .......Answer.........channels that allow for the faster
movement of water across membranes (facilitated diffusion)
,age 2 of 44
TRANSPORTERS .......Answer.........transmembrane proteins
- bind solutes in hydrophilic pocket + conformational change
results in release on other side
- important for uptake of sugars, amino acids + nucleotides
- 100 to 1000 molecules per second
(facilitated diffusion)
UNIPORTERS .......Answer.........a transporter that carries a single
solute across a cell membrane
primary active transport
SYMPORTERS .......Answer.........drives the active transport of a
molecule by using pre-existing gradient of another
secondary active transport
,age 3 of 44
ANTIPORTERS .......Answer.........drives the transport of once
molecule by using the pre-existing gradient of another
- bulk transport: exocytosis
secondary active transport
The "HD gene" (huntingtin) was discovered in 1993. Did this
discovery lead to a complete understanding of the cause of HD?
.......Answer.........no, because the functions of normal and altered
Huntingtin proteins are still unclear
Dr. Huntington used observations on phenotypes in families to
prove that the illness he studied was a genetic disease
.......Answer.........False
Pedigree analysis involves making diagrams that can be used to
infer hereditary processes. .......Answer.........True
, age 4 of 44
Dr. Wexler's pedigree studies that took place in Venezuela are
best described as association studies .......Answer.........True
The study of "normal" brains and those of Huntington's disease
patients indicated that Huntington's disease causes atrophy of
parts of the brain. .......Answer.........False
Which of the following process(es) is/are involved in how a gene
codes for a protein? .......Answer.........Transcription/Tanslation
Which of the following is a "gene product"? .......Answer.........a
messenger RNA transcribed from a gene /a protein encoded by
a gene
Which of the following statements is correct?
.......Answer.........transcription uses DNA/RNA - none of the above
