This is part 2 of the questions i couldnt fit all of them on there lol.
11.
(03.05...
This is part 2 of the questions i couldnt fit all of them on there lol.
11.
(03.05 mc)
why must cells be able to both transcribe and replicate their dna? (2 points)
the cell's dna must be transcribed before it can be replicated.
new cells can only be created after transcription has taken place.
transcription can be used when a cell is unable to replicate.
replication creates new dna, while transcription creates mrna.
12.
(03.05 mc)
while the dna in a human skin cell was being replicated, a single base was miscopied. what is the most likely result of this skin cell? (2 points)
all the proteins the cell creates from the miscopied strand will do different jobs than the old ones.
any miscopied dna will be replaced with an accurate dna copy once the cell divides.
both new dna strands will end up together in a new cell, and the inaccurate one will be discarded.
if the new sequence codes for the same amino acid as the original cell, it will function normally.
13.
(03.05 mc)
if a trna molecule has an anticodon that reads gcu, what was the codon of the mrna molecule? (2 points)
gcu
cga
cgt
uag
14.
(03.05 mc)
while mrna strands are being created a sequence is sometimes miscopied. what will be the effect of this on the cell? (2 points)
the damaged mrna may cause cell death.
translation may not take place.
future transcription will not take place.
ribosomes may be destroyed.
15.
(03.06 mc)
what is the main source that lead to increased genetic variation? (2 points)
selective breeding
gamete mutations
adaptation
genetic drift
16.
(03.06 mc)
using the chart, which of the following point mutations will cause the least harmful effect on an individual? (2 points)
u
c
a
g
uuu
phenylalanine
ucu
serine
uau
tyrosine
ugu
cysteine
u
u
uuc
phenylalanine
ucc
serine
uac
tyrosine
ugc
cysteine
c
uua
leucine
uca
serine
uaa
stop
uga
stop
a
uug
leucine
ucg
serine
uag
stop
ugg
tryptophan
g
cuu
leucine
ccu
proline
cau
hisitidine
cgu
arginine
u
c
cuc
leucine
ccc
proline
cac
hisitidine
cgc
arginine
c
cua
leucine
cca
proline
caa
glutamine
cga
arginine
a
cug
leucine
ccg
proline
cag
glutamine
cgg
arginine
g
auu
isoleucine
acu
threonine
aau
asparagine
agu
serine
u
a
auc
isoleucine
acc
threonine
aac
asparagine
agc
serine
c
aua
isoleucine
aca
threonine
aaa
lysine
aga
arginine
a
aug
methionine/start
acg
threonine
aag
lysine
agg
arginine
g
guu
valine
gcu
alanine
gau
aspartate
ggu
glycine
u
g
guc
valine
gcc
alanine
gac
aspartate
ggc
glycine
c
gua
valine
gca
alanine
gaa
glutamate
gga
glycine
a
gug
valine
gcg
alanine
gag
glutamate
ggg
glycine
g
a change from auu to acu
a change from ugu to uga
a change from cga to aga
a change from uua to cug
17.
(03.06 mc)
tobacco products have been identified as mutagens. however, some tobacco users develop cancer and some do not. the reason for this apparent inconsistency is (2 points)
mutagens only have the capability to cause mutations if exposure lasts over 20 years
some people are more predisposed to developing cancer when exposed to mutagens
not all tobacco products are cancerous
tobacco use only causes benign tumors that are identified as noncancerous
18.
(03.06 mc)
if a mutation occurs in a body cell and the mutation changes the phenotype of the individual, what will happen to the offspring of the individual? (2 points)
the offspring may or may not inherit the new phenotype.
the offspring will inherit neither the genotype nor the phenotype change.
the offspring will inherit the new phenotype.
the offspring will inherit the change in genotype but not the phenotype change.
19.
(03.07 mc)
recently, some crop plants were genetically modified to be immune to the effects of weed killers. which of the environmental concerns should be considered before planting the resistant crops? (2 points)
an increase in crop diversity.
a decrease in crop diversity.
an increase in crop yield.
a decrease in crop yield.
20.
(03.08 mc)
if a mother carries a recessive allele for a genetic disorder, such as cystic fibrosis, under what circumstances will her children inherit the disorder? (2 points)
the children's father must also carry the recessive allele
the mother's father must also carry the recessive allele
the paternal grandfather must also carry the recessive allele
the children must be female to inherit the disorder
21.
(03.08 mc)
why would water be a priority after a natural disaster when most victims have major problems, such as the loss of a home, to deal with? (2 points)
water sources can get contaminated and infect large groups of people.
water systems must be turned off during all disasters.
water is an easier problem to solve the crisis.
water is something most people forget about during a crisis.
Answers: 1
Biology, 21.06.2019 22:00
Which excerpt from the land, part 4 best supports the claim that paul is a talented horseback rider? a/“figure that says more than anything else! now, i want to ride that stallion! " b/my daddy shook his head. "paul only rides horses he knows. ” c/? i glanced over at the other rider. the fellow was older than i, and had the weight of a man on him. d/a man out of alabama, man name of ray sutcliffe, told my daddy i was such a good rider, he wanted me to ride some races for him.
Answers: 1
Biology, 21.06.2019 22:20
Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3
Answers: 1
Biology, 22.06.2019 00:00
Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.
Answers: 1
Biology, 22.06.2019 02:30
How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?
Answers: 3
Arts, 30.12.2020 05:40
Mathematics, 30.12.2020 05:40
Mathematics, 30.12.2020 05:40
Mathematics, 30.12.2020 05:40
Mathematics, 30.12.2020 05:50
Chemistry, 30.12.2020 05:50
Mathematics, 30.12.2020 05:50
English, 30.12.2020 05:50
Mathematics, 30.12.2020 05:50
Mathematics, 30.12.2020 05:50
Mathematics, 30.12.2020 05:50
Mathematics, 30.12.2020 05:50
Mathematics, 30.12.2020 05:50