Quiz: Cells to Organisms
Points80
Questions25
Time Limit50 Minutes
Instructions
The quiz:
Covers theLearnmaterial fromModule 4: Week 4.
Contains25 multiple-choicequestions.
Islimitedto50minutes.
Allows1 attempts.
Isworth 80 points.
Submit this assignment by 11:59 p.m. (ET) on Monday of Module 4: Week 4.
Attempt History
Attempt Time Score
LATEST 60.8 out of 80
Correct answers are hidden.
Score for this quiz:60.8out of 80
Question 1
3.2#/ 3.2#pts
Your primordial (early) heart began as
a fusion of two endocardial tubes near your midline. Correct
a pouch that budded off from your primordial digestive system.
a plate-like region of cells at your posterior end.
a medial tube that slowly becomes thinner and shorter to form dorsal and
ventral aortas.
a thickening in the ventral wall of the notochord followed by deterioration of
the dorsal parts of the chord.
Question 2
3.2#/ 3.2#pts
Successful differentiation of early brain regions requires that cells destined
to form these regions
receive signals from the developing optic vesicle.
divide more slowly toward the anterior region of the neural tube.
have surface receptors for both the Wnt and SHH signal proteins. Correct
sense whether or not they are mesodermal cells or ectodermal cells.
generate more ATP for metabolic activity than the cells around them.
Question 3
3.2#/ 3.2#pts
There are more than four kinds of amino acids in proteins. Each kind of
amino acid must be coded for in mRNA. Thus, a short sequence of mRNA
bases called a(n) _________ is used to code for each amino acid in the
translation process.
codon. Correct
nucleotide.
ribonucleotide.
deoxyribonucleotide.
intron.
Question 4
3.2#/ 3.2#pts
In the three-dimensional form of the adult Dalmatian dog, the “front” end of
the animal would be named the _____ aspect.
posterior
dorsal
ventral
lateral – left
anterior Correct
Question 5
3.2#/ 3.2#pts
The nuclear membrane of the cell disintegrates during which phase of the
cell cycle?
G2 phase
Prophase Correct
S phase
metaphase
anaphase
Question 6
3.2#/ 3.2#pts
Which of the following is not involved at all in the flow of information from
archival DNA to its expression as a resulting glycoprotein?
nucleus
rough endoplasmic reticulum
chlorophyll placement into a photosystem Correct
Golgi complex
ribosomes
I Question 7
0#/ 3.2#pts
Which of the following is not a phase of the cell cycle?
G1 (growth)
S (synthesis) Incorrect
T (translation)
G2 (growth)
M (mitosis)
I Question 8
0#/ 3.2#pts
Why is the word “translation” used for protein production? Protein production
is the process of
converting the information in DNA’s amino acid sequence into protein
sequence. Inncorrect
copying the information in DNA nucleotides to RNA nucleotides.
converting the information in amino acids into the language of nucleotides.
copying the information in DNA nucleotides into amino acids.
converting the language of RNA nucleotides into the language of amino acids
in proteins.
Question 9
3.2#/ 3.2#pts
Which of the following choices lists in order the stages of mitosis?
anaphase, metaphase, prophase, telophase
prophase, anaphase, metaphase, telophase
telophase, anaphase, metaphase, prophase
metaphase, prophase, telophase, anaphase
prophase, metaphase, anaphase, telophase Correct
Question 10
3.2#/ 3.2#pts
Which of the following is a part of the overall processing of mRNA in the cell
nucleus?
A guanosine ribonucleotide “cap” is added to the front end of the RNA.
A long poly-adenine tail is added to the end of the RNA.
Intron regions are spliced out of the mRNA.
Some exon regions of the mRNA are spliced together.
all of the above. Correct
Question 11
3.2#/ 3.2#pts
In the cell nucleus a pre-mRNA has its introns removed by
the ribosome.
cap vesicles.
splicing enzymes. Correct
the endoplasmic reticulum.
the nucleolus.
Question 12
3.2#/ 3.2#pts
Which of the following is not a role of the ribosome or its subunits?
creating a channel for mRNA to enter and exit
helping tRNA anti-codons to bind to mRNA codons
comparing tRNA anti-codons against corresponding mRNA codons
binding amino acids together to form a polypeptide chain
generating ATP energy to be used by the cell in biosynthesis Correct
Question 13
3.2#/ 3.2#pts
Which of the following terms would not be used to describe an aspect of the
three-dimensional adult form?
posterior
anterior
auricular Correct
dorsal
ventral
Question 14
3.2#/ 3.2#pts
The de-condensation of visible chromosomes back into chromatin fibers is a
defining feature of which phase of the cell cycle?
prophase
S phase
G1 phase
metaphase
telophase Correct
Question 15
3.2#/ 3.2#pts
The “S” phase of the cell cycle represents the activity of
RNA message generation.
DNA synthesis. Correct
protein synthesis.
nuclear separation.
chromosome separation
Question 16
3.2#/ 3.2#pts
A dominant control over the endocrine system in mature human adults is
exerted by the
cerebellum.
medulla oblongata.
pons.
hypothalamus. Correct
cerebrum.
Question 17
3.2#/ 3.2#pts
When the organism expresses a set of genes, the result is the characteristics
of that organism. These characteristics are called its
phenotype. Correct
developmental program.
genotype.
heredity.
translation.
Question 18
3.2#/ 3.2#pts
Which of the following phrases best describes the function of ribosomal RNA
(rRNA)?
It transcribes messenger and transfer RNA from DNA.
It adds structural support to the cell membrane.
It transfers amino acids to the ribosome to be incorporated into proteins.
It helps the ribosome to recognize how and where to begin working. Correct
It bonds amino acids to transfer RNAs.
Question 19
3.2#/ 3.2#pts
A sequence of human cell divisions accompanied by some growth and cell
differentiation convert an early ___________ into a hollow ball of cells called a
_________.
zygote, morula
primitive streak, neural tube
morula, blastocyst Correct
blastocyst, chorion
zygote, 8-cell stage embryo
Question 20
3.2#/ 3.2#pts
What is the role of tRNA synthetase?
assembling mRNA molecules.
guiding mRNA out of the nucleus.
bonding the correct amino acid to its corresponding tRNA molecule. Correct
bonding together the amino acids to form the polypeptide.
transferring the information from DNA to mRNA.
I Question 21
0#/ 3.2#pts
When DNA is replicated, which of the following is not involved?
an RNA polymerase to generate mRNA
a DNA polymerase to generate daughter strands Incorrect
binding proteins to hold parent strands apart
a helicase protein to drive the parent strands apart
a gyrase protein to unwind parent strands
I Question 22
0#/ 3.2#pts
What purpose does the process of mitosis serve?
It splits the cell’s membrane into two portions so that the nucleus of each
daughter cell can be reformed.
It replicates the DNA so that each daughter cell receives twice as many
chromosomes as the maternal cell had.
It duplicates maternal DNA strands providing enough DNA for each daughter
cell. Incorrect
It systematically splits duplicated chromosomes sending one copy into each
daughter cell.
It cuts the number of chromosomes in half in preparation to produce egg and
sperm cells.
I Question 23
0#/ 3.2#pts
During G2 phase
the daughter cell begins its initial growth process.
the cell cycle comes to a halt for lack of available nutrients.
the chromosomes line up within a plane across the middle of the cell.
Incorrect
the cell’s membrane is being cleaved in two to generate daughter cells.
cellular architecture needed to distribute chromosomes is constructed.
Question 24
3.2#/ 3.2#pts
Which of the following structural changes occurs during prophase of mitosis?
Microtubules pull sister chromatids to opposite poles of the mitotic spindle.
Shortening of microtubules pulls all chromosomes to the midline of the
spindle.
Centrosomes approach their completion of migrating to opposite spindle
poles. Correct
DNA is being replicated so that chromosomes will consist of two sister
chromatids.
nuclear membranes reform around chromatin as cytokinesis begins.
I Question 25
0#/ 3.2#pts
Once the protein release factor enters the ribosome, other releasing factors
enter as well. The ribosome responds by coming apart and releasing the new
protein. This process is called
the protein initiation stage. Incorrect
the sugar polymerization phase.
the elongation stage.
the termination stage.
post termination reassembly.
