1 | Page
Bios 251 Week 8 Final Exam Questions And
Verified Answers | Latest Update 2026/2027 |
Rated A+ | Guaranteed Pass!!
Effector - correct -answer-receives output from control center, respond
either reduces or enhances stimulus
Fibrous proteins - correct -answer-Structural proteins; insoluble
provides mechanical support and strength
Purines - correct -answer-have large, two-ring bases
Adenine (A) and guanine (G)
Pyrimidines - correct -answer-have small, single-ring bases
Cytosine (C) , thymine (T), uracil (U)
,2 | Page
Deoxyribonucleic acid (DNA) - correct -answer-double stranded helix;
Primarily found inside nucleus
A always bonds with T
G always bonds with C
Globular proteins - correct -answer-functional proteins; soluble plays
role in biological processes can be denatured
Ribonucleic acid (RNA) - correct -answer-single stranded
A bonded with U
G bonded with C
Fluid mosaic model
Double (bilayer) of lipids
Proteins dispersed throughout - correct -answer-What are the properties
of structure in the plasma membrane
Outer boundary of the cell;
,3 | Page
Separates intracellular fluid and extracellular fluid - correct -answer-
what is the function of the plasma membrane
Transmembrane - correct -answer-protrudes on both sides
Outer boundary of the cell
Separates intracellular fluid and extracellular fluid - correct -answer-
what are the functions of integral proteins
cell to cell connection - correct -answer-what is the function of
peripheral proteins
Passive Transport - correct -answer-do not require energy, substances
move down their concentration gradient
Active Transport - correct -answer-requires energy to move solutes
usually ATP
, 4 | Page
Simple diffusion - correct -answer-non-polar and lipid soluble
substances directly through phospholipid bilayer
facilitated diffusion - correct -answer-transported substance needs a
little help to cross the membrane
Carrier-mediated facilitated diffusion - correct -answer-binds to a
carrier protein to move across membrane
channel-mediated facilitated diffusion - correct -answer-pass through
water-filled channels to move across membrane
Diffusion - correct -answer-Move from high concentration to low
concentration Lipid soluble
Small (fits through membrane channels
Assisted by carrier molecule - correct -answer-Hydrophobic core of
plasma membrane can limit diffusion, but will occur if
Bios 251 Week 8 Final Exam Questions And
Verified Answers | Latest Update 2026/2027 |
Rated A+ | Guaranteed Pass!!
Effector - correct -answer-receives output from control center, respond
either reduces or enhances stimulus
Fibrous proteins - correct -answer-Structural proteins; insoluble
provides mechanical support and strength
Purines - correct -answer-have large, two-ring bases
Adenine (A) and guanine (G)
Pyrimidines - correct -answer-have small, single-ring bases
Cytosine (C) , thymine (T), uracil (U)
,2 | Page
Deoxyribonucleic acid (DNA) - correct -answer-double stranded helix;
Primarily found inside nucleus
A always bonds with T
G always bonds with C
Globular proteins - correct -answer-functional proteins; soluble plays
role in biological processes can be denatured
Ribonucleic acid (RNA) - correct -answer-single stranded
A bonded with U
G bonded with C
Fluid mosaic model
Double (bilayer) of lipids
Proteins dispersed throughout - correct -answer-What are the properties
of structure in the plasma membrane
Outer boundary of the cell;
,3 | Page
Separates intracellular fluid and extracellular fluid - correct -answer-
what is the function of the plasma membrane
Transmembrane - correct -answer-protrudes on both sides
Outer boundary of the cell
Separates intracellular fluid and extracellular fluid - correct -answer-
what are the functions of integral proteins
cell to cell connection - correct -answer-what is the function of
peripheral proteins
Passive Transport - correct -answer-do not require energy, substances
move down their concentration gradient
Active Transport - correct -answer-requires energy to move solutes
usually ATP
, 4 | Page
Simple diffusion - correct -answer-non-polar and lipid soluble
substances directly through phospholipid bilayer
facilitated diffusion - correct -answer-transported substance needs a
little help to cross the membrane
Carrier-mediated facilitated diffusion - correct -answer-binds to a
carrier protein to move across membrane
channel-mediated facilitated diffusion - correct -answer-pass through
water-filled channels to move across membrane
Diffusion - correct -answer-Move from high concentration to low
concentration Lipid soluble
Small (fits through membrane channels
Assisted by carrier molecule - correct -answer-Hydrophobic core of
plasma membrane can limit diffusion, but will occur if
