BIO 160 EXAM 2 QUESTIONS AND CORRECT
VERIFIED ANSWERS) ALREADY GRADED A
1. CNS, 2. PNS - correct answer- 1. made up of brain and
spinal cord
2. gather information (internal and external) from body and
send it to the CNS and revise what to do from the CNS. Made up
of nerves and ganglia
2 functions of cell membrane - correct answer- - maintain
conditions inside cell that aren't outside (PROTECTION)
- determine what goes in and out (SELECTIVELY PERMEABLE)
3 types of endocytosis -
1. phagocytosis
2. pinocytosis
3. receptor-mediated endocytosis - correct answer- 1. cell
eating (large molecule)
2. cell drinking ( grab H2O with nutrients
3. capturing particles, special proteins
,5-carbon sugar - know 1', 2', 3', 4', 5' carbons and what binds
where - correct answer- phosphate grp binds at 5'
nitro base binds at 1'
Active Transport - know what it is, that it requires energy, and
how it is used by cells - correct answer- - requires energy,
moving substances against the concentration gradient, low to
high concentration
- some carrier proteins perform active transport using the
energy of ATP.
EX: the sodium-potassium pump moves Na+ and K+ against their
concentration gradients across animal cell membranes.
Animal Phylogenetic Tree - correct answer- know that there
is a single common ancestor for all animals, that
choanoflagellates are the sister taxon to animals, that sponges
are the basal taxon within animals - branching before true tissue
or symmetry evolved.
Asexual/Sexual Reproduction - be able to compare and contrast
- correct answer-
,Autosomes/Sex Chromosomes - know definitions - correct
answer-
Base-Pairs
1. Know what causes the base-pairing rules.
2. Type of bond that holds complementary bases together and
whether it is strong or weak
3. Be able to give the sequence of the complementary strand to
a DNA sequence I give you - correct answer- 1. A purine
always joins to a pyrimidine, Specifically, A joins to T and C joins
to G, notice that A and T have two hydrogen bonding sites, while
C and G have three sites. A and C do not bond because their
hydrogen bonding sites don't match up.
2. hydrogen bonds hold complementary bases together, it is
normally weak, but there are a lot of these bonds so it is okay
3. ACTGAGGTTCA
TGACTCCAAGT
Bases - know the shape of purines and pyrimidines, know how
many hydrogen bonds each forms - correct answer- Shape
of Purines: BIG molecules, 2 rings (A, G)
, Pyrimidines: SMALL molecules, 1 ring (C, T)
A and T form 2 H bonds
(A pairs to T)
C and G from 3 H bonds
(C pairs to G)
Be able to answer question: In what way is a cell membrane a
structural and functional mosaic? - correct answer- A cell is
the basic unit of life, and all organisms are made up of one or
many cells. One of the things that all cells have in common is a
cell membrane. It is a barrier that separates a cell from its
surrounding environment. This outer boundary of the cell is also
called the plasma membrane. It is composed of four different
types of molecules:
Phospholipids
Cholesterol
Proteins
Carbohydrates
VERIFIED ANSWERS) ALREADY GRADED A
1. CNS, 2. PNS - correct answer- 1. made up of brain and
spinal cord
2. gather information (internal and external) from body and
send it to the CNS and revise what to do from the CNS. Made up
of nerves and ganglia
2 functions of cell membrane - correct answer- - maintain
conditions inside cell that aren't outside (PROTECTION)
- determine what goes in and out (SELECTIVELY PERMEABLE)
3 types of endocytosis -
1. phagocytosis
2. pinocytosis
3. receptor-mediated endocytosis - correct answer- 1. cell
eating (large molecule)
2. cell drinking ( grab H2O with nutrients
3. capturing particles, special proteins
,5-carbon sugar - know 1', 2', 3', 4', 5' carbons and what binds
where - correct answer- phosphate grp binds at 5'
nitro base binds at 1'
Active Transport - know what it is, that it requires energy, and
how it is used by cells - correct answer- - requires energy,
moving substances against the concentration gradient, low to
high concentration
- some carrier proteins perform active transport using the
energy of ATP.
EX: the sodium-potassium pump moves Na+ and K+ against their
concentration gradients across animal cell membranes.
Animal Phylogenetic Tree - correct answer- know that there
is a single common ancestor for all animals, that
choanoflagellates are the sister taxon to animals, that sponges
are the basal taxon within animals - branching before true tissue
or symmetry evolved.
Asexual/Sexual Reproduction - be able to compare and contrast
- correct answer-
,Autosomes/Sex Chromosomes - know definitions - correct
answer-
Base-Pairs
1. Know what causes the base-pairing rules.
2. Type of bond that holds complementary bases together and
whether it is strong or weak
3. Be able to give the sequence of the complementary strand to
a DNA sequence I give you - correct answer- 1. A purine
always joins to a pyrimidine, Specifically, A joins to T and C joins
to G, notice that A and T have two hydrogen bonding sites, while
C and G have three sites. A and C do not bond because their
hydrogen bonding sites don't match up.
2. hydrogen bonds hold complementary bases together, it is
normally weak, but there are a lot of these bonds so it is okay
3. ACTGAGGTTCA
TGACTCCAAGT
Bases - know the shape of purines and pyrimidines, know how
many hydrogen bonds each forms - correct answer- Shape
of Purines: BIG molecules, 2 rings (A, G)
, Pyrimidines: SMALL molecules, 1 ring (C, T)
A and T form 2 H bonds
(A pairs to T)
C and G from 3 H bonds
(C pairs to G)
Be able to answer question: In what way is a cell membrane a
structural and functional mosaic? - correct answer- A cell is
the basic unit of life, and all organisms are made up of one or
many cells. One of the things that all cells have in common is a
cell membrane. It is a barrier that separates a cell from its
surrounding environment. This outer boundary of the cell is also
called the plasma membrane. It is composed of four different
types of molecules:
Phospholipids
Cholesterol
Proteins
Carbohydrates
