× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
e
5
R
5
e
4
4
d
4
o
3
p
3
t
3
3
m
3
p
3
m
3
Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
Embryology, epigenetics, prenatal development, etc.
New Topic  
Subject
Last post
The epigenetic state of a cell is called its ____________________. (Fill in the blank)
The epigenetic state of a cell is called its ____________________. (Fill in the blank)
The epigenetic state of a cell is called its ____________________.
 
  Fill in the blank(s) with correct word
aschaffer   32   1 Reply
6 years ago
The epidermis is composed of:
The epidermis is composed of:
The epidermis is composed of:
A) simple columnar epithelium
B) stratified squamous epithelium
C) adipose tissue
D) areolar tissue
E) dense fibrous connective tissue
barry   387   2 Replies
10 years ago
The enzymes that catalyze the Calvin cycle are found in the
The enzymes that catalyze the Calvin cycle are found in the
The enzymes that catalyze the Calvin cycle are found in the 
a. thylakoid lumen.
b. phloem.
c. cytosol.
d. stromal space.
With806   56   1 Reply
6 years ago
The enzyme, reverse transcriptase, a. is absent in the assembled HIV. b. is code
The enzyme, reverse transcriptase, a. is absent in the assembled HIV. b. is code
The enzyme, reverse transcriptase,
a. is absent in the assembled HIV.
b. is coded for by a gene in the host’s genome.
c. does not require a template.
d. is present in the assembled HIV.
e. is needed for the replication of all
arealhero   209   3 Replies
9 years ago
The enzyme β-galactosidase catalyzes what reaction?
The enzyme β-galactosidase catalyzes what reaction?
The enzyme β-galactosidase catalyzes what reaction?
A) allolactose → glucose + lactose
B) lactose → glucose + fructose
C) lactose → galactose + glucose
D) glucose → galactose + lactose
E) galactose → glucose + lactose
mikael   789   2 Replies
10 years ago
The enzyme transacetylase is responsible for uptake of lactose. (True or false?)
The enzyme transacetylase is responsible for uptake of lactose. (True or false?)
The enzyme transacetylase is responsible for uptake of lactose.
 
  Indicate whether the statement is true or false
littlescientist   36   2 Replies
6 years ago
The enzyme that unwinds the DNA prior to replication is called a. DNA polymerase
The enzyme that unwinds the DNA prior to replication is called a. DNA polymerase
The enzyme that unwinds the DNA prior to replication is called
a. DNA polymerase III.
b. DNA ligase.
c. single-stranded DNA binding protein.
d. primase.
e. helicase.
arealhero   303   3 Replies
9 years ago
The enzyme that restores the phosphodiester linkage between adjacent fragments i
The enzyme that restores the phosphodiester linkage between adjacent fragments i
The enzyme that restores the phosphodiester linkage between adjacent fragments in the lagging strand during DNA replication is
a. DNA ligase.
b. primase.
c. reverse transcriptase.
d. helicase.
e. DNA polymerase I.
arealhero   253   3 Replies
9 years ago
The enzyme that catalyzes the synthesis of RNA is a. peptidyl transferase. b. DN
The enzyme that catalyzes the synthesis of RNA is a. peptidyl transferase. b. DN
The enzyme that catalyzes the synthesis of RNA is
a. peptidyl transferase.
b. DNA polymerase.
c. tRNA synthase.
d. ribosomal RNA.
e. RNA polymerase.
arealhero   249   3 Replies
9 years ago
The enzyme that allows the reforming of a circular plasmid following conjugation is called ...
The enzyme that allows the reforming of a circular plasmid following conjugation is called ...
The enzyme that allows the reforming of a circular plasmid following conjugation is called _________.
 
  A. relaxosome
  B. relaxase
  C. F' factor
  D. nucleoprotein
  E. pili protein
AyeDocJ   59   1 Reply
6 years ago
The enzyme terminase is responsible for
The enzyme terminase is responsible for
The enzyme terminase is responsible for
 
  a. formation of eukaryotic centromeres.
  b. packaging a phage genome into its capsid.
  c. the decondensation of eukaryotic chromatin.
  d. supercoiling bacterial DNA.
  e. f
GermanBiter14   52   2 Replies
6 years ago
The enzyme polynucleotide phosphorylase is capable of generating a random assembly of ...
The enzyme polynucleotide phosphorylase is capable of generating a random assembly of ...
The enzyme polynucleotide phosphorylase is capable of generating a random assembly of ribonucleotides.
 
  Indicate whether the statement is true or false
kljkjkskss   46   1 Reply
6 years ago
The enzyme phosphofructokinase is the major regulatory enzyme of glycolysis. It catalyzes
The enzyme phosphofructokinase is the major regulatory enzyme of glycolysis. It catalyzes
The enzyme phosphofructokinase is the major regulatory enzyme of glycolysis. It catalyzes
A) the first of the 10 reactions of glycolysis.
B) the isomerization of glucose 6-phosphate to fructose 6-phosphate.
C) the phosphorylation of fr
ceybe   81   1 Reply
6 years ago
The enzyme permease cleaves the linkage between glucose and galactose residues in lactose. ...
The enzyme permease cleaves the linkage between glucose and galactose residues in lactose. ...
The enzyme permease cleaves the linkage between glucose and galactose residues in lactose.
 
  Indicate whether the statement is true or false
sarweston   46   1 Reply
6 years ago
The enzyme in cholesterol biosynthesis subject to feedback inhibition is
The enzyme in cholesterol biosynthesis subject to feedback inhibition is
The enzyme in cholesterol biosynthesis subject to feedback inhibition is
a. ABCB4.
b. desaturase.
c. fatty acid synthase.
d. HMG CoA reductase.
AidenSmith   52   1 Reply
6 years ago
The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a recessive gene on ...
The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a recessive gene on ...
The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a recessive gene on the X chromosome in humans. A phenotypically normal woman (whose father had G6PD) is married to a normal man.
 
  (a) What fraction of their
litty 123   61   1 Reply
6 years ago
The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a
The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a
The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a recessive gene on the X chromosome in humans. A phenotypically normal woman (whose father had G6PD) is married to a normal man.

(a) What fraction of their so
colleen   1185   2 Replies
10 years ago
The enzyme DNA ligase is required continuously during DNA replication because a.
The enzyme DNA ligase is required continuously during DNA replication because a.
The enzyme DNA ligase is required continuously during DNA replication because
a. fragments of the leading strand must be joined together.
b. fragments of the lagging strand must be joined together.
c. the parental strands must be joine
arealhero   286   3 Replies
9 years ago
The enzyme alcohol dehydrogenase is capable of catalyzing the oxidation of a number of different ...
The enzyme alcohol dehydrogenase is capable of catalyzing the oxidation of a number of different ...
The enzyme alcohol dehydrogenase is capable of catalyzing the oxidation of a number of different substances, including ethanol, ethylene glycol, and methanol, to an aldehyde.  The metabolic products of both ethylene glycol and methanol are highl
AidenSmith   55   1 Reply
6 years ago
The enzyme -galactosidase catalyzes what reaction?
The enzyme -galactosidase catalyzes what reaction?
The enzyme -galactosidase catalyzes what reaction?
 
  A) allolactose  glucose + lactose
  B) lactose  glucose + fructose
  C) lactose  galactose + glucose
  D) glucose  galactose + lactose
  E) galactose  glucose + lac
noahrcline   58   2 Replies
6 years ago
The enzymatic activity of a telomerase is best described as a :
The enzymatic activity of a telomerase is best described as a :
The enzymatic activity of a telomerase is best described as a
 
  A) polymerase.
  B) ligase.
  C) topoisomerase.
  D) reverse transcriptase.
  E) exonuclease.
meli3198   67   1 Reply
6 years ago
The environment can impact the phenotype encoded by polygenic inheritance.
The environment can impact the phenotype encoded by polygenic inheritance.
[html]The environment can impact the phenotype encoded by polygenic inheritance.
wakejames   37   1 Reply
3 years ago
The entry of uncharged tRNA into the ribosomal A site triggers what reaction?
The entry of uncharged tRNA into the ribosomal A site triggers what reaction?
The entry of uncharged tRNA into the ribosomal A site triggers what reaction?

▸ Initiation reaction

▸ Allosteric reaction

▸ Acetylation reaction

▸ Induction response

▸ Stringent response
Dante52   27   1 Reply
A year ago
The energy necessary for making a DNA molecule comes directly from a. sugar. b.
The energy necessary for making a DNA molecule comes directly from a. sugar. b.
The energy necessary for making a DNA molecule comes directly from
a. sugar.
b. ATP.
c. the release of phosphates.
d. NADPH.
e. NADH.
arealhero   240   3 Replies
9 years ago
The ends of chromosomes have areas of repeated DNA called centromeres. (True or false?)
The ends of chromosomes have areas of repeated DNA called centromeres. (True or false?)
The ends of chromosomes have areas of repeated DNA called centromeres.
 
  Indicate whether the statement is true or false
coltenyeske@aub   58   1 Reply
6 years ago
The endometrium of pregnancy is called the __________.
The endometrium of pregnancy is called the __________.
The endometrium of pregnancy is called the __________.
 
  A. mesoderm
  B. chorionic vesicle
  C. decidua
  D. fetal membrane
dillosunion   36   2 Replies
6 years ago
The end result of meiosis in fungi is a tetrad of spores (True or false?)
The end result of meiosis in fungi is a tetrad of spores (True or false?)
The end result of meiosis in fungi is a tetrad of spores.
 
  Indicate whether the statement is true or false
Goodtomyself   49   1 Reply
6 years ago
The end result of meiosis in animals is ______.
The end result of meiosis in animals is ______.
The end result of meiosis in animals is ______.
 
  A. two diploid cells
  B. two haploid cells
  C. four diploid cells
  D. four haploid cells
  E. None of the answers are correct
brunex16013   67   1 Reply
6 years ago
The end product(s) of glycolysis is(are):
The end product(s) of glycolysis is(are):
The end product(s) of glycolysis is(are):
 
  a. acetyl CoA
  b. carbon dioxide
  c. pyruvate
  d. glucose
  e. glucose and carbon dioxide
markiplier908   51   1 Reply
6 years ago
The embryonic precursor to the human spinal cord is the
The embryonic precursor to the human spinal cord is the
 The embryonic precursor to the human spinal cord is the   
A) notochord.
B) neural tube.
C) archenteron.
D) set of bilateral somites.
E) mesoderm.
ppk   2933   1 Reply
12 years ago
The embryonic period of prenatal development occurs from week 3 until week 8.
The embryonic period of prenatal development occurs from week 3 until week 8.
The embryonic period of prenatal development occurs from week 3 until week 8.
Cali Fornia   159   1 Reply
7 years ago
The electrophoresis gel shown below is from a DNase I footprint analysis of an operon transcription ...
The electrophoresis gel shown below is from a DNase I footprint analysis of an operon transcription ...
[html]The electrophoresis gel shown below is from a DNase I footprint analysis of an operon transcription control region. Separate samples of control-region DNA were exposed to DNase I and run in the following lanes:  uprotected DNA is in lane 1, DNA
Guest   63   1 Reply
2 years ago
The effects of mutation are minimized by the fact that
The effects of mutation are minimized by the fact that
The effects of mutation are minimized by the fact that
 
  a. there are only 3 termination codons.
  b. DNA is chemically similar to RNA.
  c. chemically similar amino acids are represented by similar codons.
  d. codons are
Rodderick   36   1 Reply
6 years ago
The effects of Cro and cI on bacteriophage ? are a. competitive. b. cooperative.
The effects of Cro and cI on bacteriophage ? are a. competitive. b. cooperative.
The effects of Cro and cI on bacteriophage ? are
a. competitive.
b. cooperative.
c. coordinate.
d. inverted.
e. additive.
arealhero   128   3 Replies
9 years ago
The effects of a deficiency on an organism is dependent on the size of the deletion and the ...
The effects of a deficiency on an organism is dependent on the size of the deletion and the ...
The effects of a deficiency on an organism is dependent on the size of the deletion and the importance of the missing genetic material to the organism.
 
  Indicate whether the statement is true or false
michelle6899   41   1 Reply
6 years ago
The effect of each dominant allele of a complex trait is ____________________ and _______________. ...
The effect of each dominant allele of a complex trait is ____________________ and _______________. ...
The effect of each dominant allele of a complex trait is ____________________ and _______________.
 
  Fill in the blank(s) with correct word
vincent_pijen   28   1 Reply
6 years ago
The editing of glutamate receptor transcripts in rat brain involves:
The editing of glutamate receptor transcripts in rat brain involves:
[html]The editing of glutamate receptor transcripts in rat brain involves:

▸ deamination of a cytidine to a uridine.

▸ deamination of an adenosine to inosine.

▸ demethylation of a uridine.

▸ demethylation of a guanosine.

▸ insertion of a single
nsdq007   33   1 Reply
A year ago
The editing of apolipoprotein-B transcripts in mammalian intestine involves:
The editing of apolipoprotein-B transcripts in mammalian intestine involves:
The editing of apolipoprotein-B transcripts in mammalian intestine involves:

▸ deamination of a C.

▸ deamination of an A.

▸ demethylation of a U.

▸ demethylation of a G.

▸ demethylation of a C.
mdensmore   39   1 Reply
A year ago
The ectoderm, mesoderm, and endoderm are formed during the ____ stage of embryogenesis.
The ectoderm, mesoderm, and endoderm are formed during the ____ stage of embryogenesis.
The ectoderm, mesoderm, and endoderm are formed during the ____ stage of embryogenesis.
 
  A. fertilization
  B. cellular blastoderm
  C. syncytial blastoderm
 
  D. gastrulation
riley.hively   56   1 Reply
6 years ago
The ectoderm should give rise to tissues containing
The ectoderm should give rise to tissues containing
The ectoderm should give rise to tissues containing     
A) red and blue colors.
B) yellow and purple colors.
C) green and red colors.
D) red and yellow colors.
E) purple and green colors.
ppk   2336   1 Reply
12 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
  1026 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Gallery
  
 1056
  
 56
  
 285
Your Opinion
What's your favorite coffee beverage?
Votes: 299
Previous poll results: What percentage of nature vs. nurture dictates human intelligence?