× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
Embryology, epigenetics, prenatal development, etc.
New Topic  
Subject
Last post
Rescue of stalled ribosomes in bacteria is accomplished by:
Rescue of stalled ribosomes in bacteria is accomplished by:
Rescue of stalled ribosomes in bacteria is accomplished by:

▸ a unique tRNA.

▸ a unique rRNA.

▸ a unique mRNA-tRNA hybrid.

▸ a unique rRNA-tRNA hybrid.

▸ a unique mRNA-rRNA hybrid.
moreme   20   1 Reply
A year ago
Selenocysteine is inserted for only some of which of the following codons in genes that encode selenoproteins?
Selenocysteine is inserted for only some of which of the following codons in genes that encode selenoproteins?
Selenocysteine is inserted for only some of which of the following codons in genes that encode selenoproteins?

▸ UGU

▸ UAG

▸ UAU

▸ UGA

▸ UAA
farendrn   20   1 Reply
A year ago
Which suppressors are relatively efficient because the codon(s) is/are used rather infrequently to ...
Which suppressors are relatively efficient because the codon(s) is/are used rather infrequently to ...
[html]Which suppressors are relatively efficient because the codon(s) is/are used rather infrequently to terminate protein synthesis in E. coli?

▸ Amber suppressors

▸ Ochre suppressors

▸ Opal suppressors

▸ Amber and ochre suppressor
urraberry   20   1 Reply
A year ago
Coactivators are proteins that bind to:
Coactivators are proteins that bind to:
Coactivators are proteins that bind to:

▸ other proteins to enhance transcription.

▸ promoters.

▸ enhancers.

▸ promoters and enhancers.

▸ histone proteins.
meghan.binge   20   1 Reply
A year ago
Deacetylated chromatin tends to be:
Deacetylated chromatin tends to be:
[html]Deacetylated chromatin tends to be:

▸ more relaxed; less condensed than acetylated chromatin.

▸ more condensed than acetylated chromatin.

▸ about the same density as acetylated chromatin.

▸ still associated with core histones but mis
coleshear   20   1 Reply
A year ago
In the active state of chromatin:
In the active state of chromatin:
[html]In the active state of chromatin:

▸ histone octamer binding to the DNA is modified to facilitate transcription factor binding.

▸ histone octamers are associated with the DNA and prevent transcription factor binding.

▸ the basal transc
dcooper78   20   1 Reply
A year ago
The yeast two-hybrid assay is used to identify:
The yeast two-hybrid assay is used to identify:
The yeast two-hybrid assay is used to identify:

▸ protein-DNA interactions.

▸ protein-protein interactions.

▸ protein-RNA interactions.

▸ DNA-RNA interactions.

▸ DNA-histone interactions.
calcrismore   20   1 Reply
A year ago
True or False? In yeast cells grown in low glucose levels, the GAL genes are repressed.
True or False? In yeast cells grown in low glucose levels, the GAL genes are repressed.
True or False? In yeast cells grown in low glucose levels, the GAL genes are repressed.

▸ true

▸ false
tara.harris.9   20   1 Reply
A year ago
RNA-dependent RNA polymerases are found in:
RNA-dependent RNA polymerases are found in:
RNA-dependent RNA polymerases are found in:

▸ plants only.

▸ all animals only.

▸ plants and all animals.

▸ some animals only.

▸ plants and some animals.
nisha   20   1 Reply
A year ago
Which of the following is not a mechanism involved in the control of reinitiation of replication in E. coli?
Which of the following is not a mechanism involved in the control of reinitiation of replication in E. coli?
[html]Which of the following is not a mechanism involved in the control of reinitiation of replication in E. coli?

▸ Physical sequestration of the origin

▸ Delay in remethylation

▸ Competition for DnaA binding at different sites

▸ I
anatomy66   20   1 Reply
A year ago
What is typically the slowest step of translation?
What is typically the slowest step of translation?
What is typically the slowest step of translation?

▸ Initiation

▸ Elongation

▸ Translocation

▸ Termination

▸ All steps occur at about the same rate.
usmc2rn   20   1 Reply
A year ago
The portion of the DNA molecule that is translated is composed of
The portion of the DNA molecule that is translated is composed of
The portion of the DNA molecule that is translated is composed of
 
  a. introns.
  b. anticodons.
  c. exons.
  d. transcriptons.
  e. exons and introns.
meli3198   21   1 Reply
6 years ago
Explain why a pregnant woman should not have an abdominal X-ray and identify the possible ...
Explain why a pregnant woman should not have an abdominal X-ray and identify the possible ...
Explain why a pregnant woman should not have an abdominal X-ray and identify the possible consequences to the fetus if she does.
 
  What will be an ideal response?
Naf87   21   1 Reply
6 years ago
Discuss how the therapy for PKU would be different if the disease was not caused by the essential ...
Discuss how the therapy for PKU would be different if the disease was not caused by the essential ...
Discuss how the therapy for PKU would be different if the disease was not caused by the essential amino acid phenylalanine, but rather by a non-essential amino acid. Would the disorder be potentially more or less life-threatening? Explain your reason
brunex16013   21   1 Reply
6 years ago
List the three factors required for gene therapy, and explain the difference between ex vivo and in ...
List the three factors required for gene therapy, and explain the difference between ex vivo and in ...
List the three factors required for gene therapy, and explain the difference between ex vivo and in vivo gene therapy.
 
  What will be an ideal response?
Basketball1121   21   2 Replies
6 years ago
The name of the enzyme that replicates DNA is ____________________. (Fill in the blank)
The name of the enzyme that replicates DNA is ____________________. (Fill in the blank)
The name of the enzyme that replicates DNA is ____________________.
 
  Fill in the blank(s) with correct word
Shaquantta   21   1 Reply
6 years ago
In Mendel's pea plant experiment, the trait of pea shape was represented by the two variations ...
In Mendel's pea plant experiment, the trait of pea shape was represented by the two variations ...
In Mendel's pea plant experiment, the trait of pea shape was represented by the two variations ____________________ and ____________________.
 
  Fill in the blank(s) with correct word
rahrah23   21   1 Reply
6 years ago
Recombinant DNA technology has been used for over 30 years to produce ____________________ in ...
Recombinant DNA technology has been used for over 30 years to produce ____________________ in ...
Recombinant DNA technology has been used for over 30 years to produce ____________________ in bacteria for the treatment of diabetes.
 
  Fill in the blank(s) with correct word
tiffanygaebel   21   1 Reply
6 years ago
LacId mutations (Multiple Choice)
LacId mutations (Multiple Choice)
lacId mutations
 
  a. can inactivate the repressor even if only one of the four subunits is mutant.
  b. occur in the region of the gene encoding the inducer binding site.
  c. are cis-acting.
  d. can only inactivate the r
cnv02   21   1 Reply
6 years ago
A regulatory circuit in which an inactive repressor is produced and requires a corepressor to be ...
A regulatory circuit in which an inactive repressor is produced and requires a corepressor to be ...
A regulatory circuit in which an inactive repressor is produced and requires a corepressor to be activated is said to be
 
  a. negative inducible.
  b. negative repressible.
  c. constitutive.
  d. positive inducible.
amui10   21   1 Reply
6 years ago
A situation in which certain exons could either be included or spliced out is called _______.
A situation in which certain exons could either be included or spliced out is called _______.
A situation in which certain exons could either be included or spliced out is called _______.
 
  a. alternative splicing
  b. mature splicing
  c. translation
  d. protein splicing
  e. none of the above
costfrost   21   1 Reply
6 years ago
The counterpart to the use of mtDNA to reconstruct maternal lineages is the use of chloroplast DNA ...
The counterpart to the use of mtDNA to reconstruct maternal lineages is the use of chloroplast DNA ...
The counterpart to the use of mtDNA to reconstruct maternal lineages is the use of chloroplast DNA to reconstruct paternal lineages.
 
  Indicate whether the statement is true or false
Drea Anna   21   1 Reply
6 years ago
In limb-positioning in tetrapods, the _______ acts as an organizer to promote digit formation at the ...
In limb-positioning in tetrapods, the _______ acts as an organizer to promote digit formation at the ...
In limb-positioning in tetrapods, the _______ acts as an organizer to promote digit formation at the distal ends of limb buds.
 
  Fill in the blank(s) with correct word
ekmj   21   1 Reply
6 years ago
What were the genotypes of the sinistral female and dextral male that were initially chosen?
What were the genotypes of the sinistral female and dextral male that were initially chosen?
What were the genotypes of the sinistral female and dextral male that were initially chosen?
 
  A) dd female and Dd male
  B) Dd female and dd male
  C) dd female and DD male
  D) DD female and dd male
  E) Dd female a
vincent_pijen   21   1 Reply
6 years ago
The differences in evolutionary rates of change revealed by relative rate tests may be attributable ...
The differences in evolutionary rates of change revealed by relative rate tests may be attributable ...
The differences in evolutionary rates of change revealed by relative rate tests may be attributable to
 
  A) differential strength of selection.
  B) generation time.
  C) average DNA repair efficiency.
  D) differential ex
Sauce1387   21   1 Reply
6 years ago
What was the significance of the 1978 finding by Philip Leder's research group that the 0.7 kb ...
What was the significance of the 1978 finding by Philip Leder's research group that the 0.7 kb ...
What was the significance of the 1978 finding by Philip Leder's research group that the 0.7 kb -globin mRNA is not colinear with the gene that encodes it, but the nuclear 1.5 kb pre-mRNA is?
 
  What will be an ideal response?
jeremy.l32   21   1 Reply
6 years ago
Indels are : (Multiple Choice)
Indels are : (Multiple Choice)
Indels are
 
  A) index deletions used to identify a species.
  B) parsimonious trees.
  C) transitions and transversions combined.
  D) small deletions or insertions that produce gaps in sequence alignments.
  E) the r
bezel   21   1 Reply
6 years ago
Explain how transcriptional control by the NrpR protein of the archaeon Methanococcus maripaludis is ...
Explain how transcriptional control by the NrpR protein of the archaeon Methanococcus maripaludis is ...
Explain how transcriptional control by the NrpR protein of the archaeon Methanococcus maripaludis is similar to transcriptional control in bacteria. It is known that 2-oxoglutarate (2OG) is used by cells as an indicator of nitrogen deficiency.
 
rocketleague   21   1 Reply
6 years ago
Which of the following secondary structures may be a DNA-binding domain?
Which of the following secondary structures may be a DNA-binding domain?
Which of the following secondary structures may be a DNA-binding domain?
 
  A) Zinc finger
  B) Leucine zipper
  C) Helix-turn-helix
  D) A and B only
  E) A, B, and C
chayes2321   21   2 Replies
6 years ago
Hormones can be considered : (Multiple Choice)
Hormones can be considered : (Multiple Choice)
Hormones can be considered
 
  A) inducers.
  B) repressors.
  C) transcription regulators.
  D) translation regulators.
  E) enzymes.
LL06   21   2 Replies
6 years ago
A proto-oncogene that gains function due to amplification, translocation to a more transcriptionally ...
A proto-oncogene that gains function due to amplification, translocation to a more transcriptionally ...
A proto-oncogene that gains function due to amplification, translocation to a more transcriptionally active area of the genome, or a mutation that causes either an increase in function or the suppression of down-regulation, is
 
  A) a pse
Trejo92   21   1 Reply
6 years ago
The blending theory would predict that the phenotype seen in the F1 generation from a cross between ...
The blending theory would predict that the phenotype seen in the F1 generation from a cross between ...
The blending theory would predict that the phenotype seen in the F1 generation from a cross between a pure breeding plant with dark purple flowers and a pure breeding plant with white flowers would be __________.
 
  A) dark purple
 
littlescientist   21   1 Reply
6 years ago
The visual proof that chromosomes exchange pieces of information during crossing over was provided ...
The visual proof that chromosomes exchange pieces of information during crossing over was provided ...
The visual proof that chromosomes exchange pieces of information during crossing over was provided by __________.
 
  A. Bateson and Punnett
  B. Morgan and Bridges
  C. Creighton and McClintock
  D. Watson and Crick
gltech99   21   2 Replies
6 years ago
An individual who contains cells that are mutated is called a chimera. (True or false?)
An individual who contains cells that are mutated is called a chimera. (True or false?)
An individual who contains cells that are mutated is called a chimera.
 
  Indicate whether the statement is true or false
kyrabunga   21   1 Reply
6 years ago
The absence of a band when the linker is present at about -25 indicates that
The absence of a band when the linker is present at about -25 indicates that
The absence of a band when the linker is present at about -25 indicates that
 
  A. This region is critical for the in vitro transcription reaction
  B. this region is not critical for the in vitro transcription reaction
  C. i
WadeChl   21   1 Reply
6 years ago
After calculating a correlation coefficient you discover that the value is not significant at the 5 ...
After calculating a correlation coefficient you discover that the value is not significant at the 5 ...
After calculating a correlation coefficient you discover that the value is not significant at the 5 level. What can be done to produce a significant difference?
 
  A. Increase the sample size
  B. Decrease the sample size
  C. N
Yvonne98   21   1 Reply
6 years ago
Huntington disease in humans is an example of a(n) ____________.
Huntington disease in humans is an example of a(n) ____________.
Huntington disease in humans is an example of a(n) ____________.
 
  A. essential gene
  B. lethal allele
  C. semilethal allele
  D. nonessential gene
 
  E. conditional lethal allele
dillosunion   21   1 Reply
6 years ago
If an allele is inherited on the X chromosome, but not the Y, it is said to be an example of ...
If an allele is inherited on the X chromosome, but not the Y, it is said to be an example of ...
If an allele is inherited on the X chromosome, but not the Y, it is said to be an example of ________.
 
  A. autosomal inheritance
  B. X-linked inheritance
  C. chromosome theory of inheritance
  D. homogametic sex
Trejo92   21   1 Reply
6 years ago
Describe three common developmental abnormalities of the kidneys.
Describe three common developmental abnormalities of the kidneys.
Describe three common developmental abnormalities of the kidneys.
 
  What will be an ideal response?
coltenyeske@aub   21   1 Reply
6 years ago
Match the type of cancer listed below to the physical symptom that is often associated with it. ...
Match the type of cancer listed below to the physical symptom that is often associated with it. ...
Match the type of cancer listed below to the physical symptom that is often associated with it.
 
  __ Colon cancer
  __ Breast cancer
  __ Cervical cancer
  __ Melanoma
  __ Hodgkin lymphoma
 
  A. Enlarged
vincent_pijen   21   2 Replies
6 years ago
New Topic  
Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
Explore
Post your homework questions and get free online help from our incredible volunteers
  1214 People Browsing
 125 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Gallery
  
 166
  
 391
  
 29
Your Opinion
Who will win the 2024 president election?
Votes: 3
Closes: November 4
Previous poll results: What percentage of nature vs. nurture dictates human intelligence?