bio test 3 chapter 13 connect questions
A friend asks you a question after your biology class. "What's genetic engineering?" Your answer is:
"Genetic engineering is moving genes from one organism to another."
Only about _____of the human genome is composed of protein-encoding genes.
1%
If you start with one double-stranded DNA molecule and you perform SIX cycles of PCR, how many double-stranded copies of the DNA will you have?
64
Which of the following problems exist when performing human gene therapy? The vector used to carry the gene may elicit a strong immune response, leading to rejection of the added gene. The virus vector may cause a lethal immune reaction itself in rare cases. The virus vector may insert its DNA into the middle of a gene, which could lead to cancer. All of the choices are correct.
ALL
In therapeutic cloning, why are the embryonic cells used to treat an individual not rejected by that individual?
Because the embryonic cells are cloned from the same individual they are injected into
The enzyme ______ is then used to join fragments of DNA that have been cut with the same restriction enzymes.
DNA ligase
Which of the following is incorrect about the polymerase chain reaction?
It cannot be used on very old samples of tissue or blood.
Which statement best explains the role of a vector in recombinant DNA technology?
It carries a segment of DNA to be cloned.
Which is correct about cDNA? It represents the gene without the introns. Reverse transcriptase is used on the primary transcript. Bacteria possess reverse transcriptase. It is normally found in the nucleus of eukaryotic cells. It is found in the nucleoid of bacteria.
It represents the gene without the introns.
Which of these is NOT a type of noncoding human DNA?
Multigene families
This method utilizes two other biotechnological procedures,____ and gel electrophoresis.
PCR
Which is incorrect about restriction enzymes? They are key tools that make genetic engineering possible. They are found in bacteria and eukaryotes. They were discovered by Werner Arber and Hamilton Smith in 1960s. A specific enzyme will always cut at the same sequence. Bacteria may possess them naturally to rid themselves of viral DNA.
They are found in bacteria and eukaryotes.
If only about 1% of the human genome is devoted to protein-encoded genes, what is the majority of the rest?
Transposable elements.
In gene therapy treatment for cystic fibrosis, healthy versions of the cf gene were transferred to patients using _______________ as a vector; unfortunately, these attempts at gene therapy failed due to _______________ and increased rate of cancer. Other vectors such as AAV are being investigated.
adenovirus; immune system attack
Recent experiments suggest that it may be possible to induce some kinds of ____cells to act like embryonic stem cells.
adult
To carry out Sanger sequencing, a mixture is needed containing single-stranded DNA. DNA polymerase. four deoxyribonucleotides A, T, C, G. All of the above.
all of the above
This type of cloning has become a common practice in some species of farm ____
animals
Adult stem cells offer an alternative to embryonic stem cells, however they:
are difficult to identify
Genomic imprinting works by:
blocking the cell's ability to read certain genes
The information for proteins is found in ____ DNA; the rest of DNA, nearly 99%, is noncoding.
coding
PCR will make ______of a section of DNA found in a sample, such as a hair or body fluid. The amplified DNA is then cut with _______.
copies restriction enzymes
Reproductive cloning is a process that creates an exact ___ of an organism.
copy
The tissue cells are injected into the patient to replace ____ tissue.
damaged
In embyronic stem cell therapy, embryonic stem cells that have escaped early _________ are grown in tissue culture.
differentiation
PCR requires all of the following EXCEPT primers. DNA ligase. DNA polymerase. DNA of interest. deoxyrobinucleotide
dna ligase
With every replication cycle, the amount of DNA is _____
doubled.
DNA fingerprinting is a method of identification based on an individual's protein array.
false
During PCR, the hydrogen bonds of the double-stranded DNA molecules are broken by the enzyme helicase.
false
The main difference between traditional DNA fingerprinting and the method that has superceded it is that the newer method does not contain variable number of tandem repeat sequences - or VNTRs.
false
One method of identifying an individual's DNA is by using DNA _____
fingerprinting.
The pieces of DNA are then loaded into a gel, and different-sized _______will move to different locations on the gel.
fragments
The resulting thousands of different sized DNA fragments are then separated by size using
gel electrophoresis.
Using _________to produce proteins needed in medicines has reduced the risk associated with using blood products obtained from other individuals.
genetic engineering
All of the genes and other DNA of an organism constitute its:
genome
Comparing the entire DNA content of different organisms
genomics
The primer used in Sanger sequencing
has a nucleotide sequence complementary to the 3' end of the region to be copied.
In animal cloning, DNA donated from an adult stem cell:
has to be reprogrammed for the gene expression needed for early development
The most likely source of the Taq polymerase used in PCR is a bacterium that lives in
hot vents
The addition of radiolabeled probe molecules to the DNA fragments results in
hybridization.
The patterns of DNA fragments are unique for each individual and so can be compared and used for _____
identification.
Therapeutic cloning successfully addresses the key problem of ________________, which must be solved before embryonic stem cells can be used to repair damaged human organs.
immune acceptance
Medicines made from eukaryotic proteins such as _____ are being produced by genetically modified bacteria.
insulin
Groups of related but different genes that occur together in a cluster are called ___________s and likely arose from a single ancestral sequence.
multigene familie
Groups of related but distinctly different genes that occur together in clusters are called:
multigene families
PCR requires the use of DNA polymerase and ______ for base pairing
nucleotides
An adult stem cell differs from an embryonic stem cell in that it is not:
pluripotent
The ____ chain reaction can create copies of a segment of DNA.
polymerase
PCR is a chain reaction because the targeted DNA is _______ replicated as long as the process continues.
repeatedly
When a dideoxyribonucleotide is added to the tube,
replication of the strand stops.
Most clones do not live a normal life span due to the lack of proper gene _____, a conditioning of DNA by its cell.
reprogramming
In genetic engineering, genes are isolated and inserted into other DNA, producing recombinant DNA. To do this, both the source and the vector DNA are first cut into fragments by ________.
restriction enzymes
Removing genes from molecules of DNA requires the use of special
restriction enzymes
In traditional DNA fingerprinting, the DNA that has been collected is cut into smaller pieces by
restriction enzymes.
A(n) _____ is a section of DNA recognized by a restriction endonuclease.
restriction site
The enzyme used to make a DNA copy complementary to processed mRNA is:
reverse transcriptase
Whole blocks of genes that have been copied from one chromosome to another are referred to as:
segmental duplications
Although many human genes exist as _______, there are still many others that exist in multiple copies. Blocks of genes called segmental duplications are those that have been copied from one chromosome to another.
single-copy genes
These animals are created from ____ adult nuclei, making them true clones.
somatic
Restriction endonucleases that produce ______ are prefered for recombinant DNA technology.
sticky ends
Identical copies of genes repeated many times in a row are called_______, and transcription of all of the copies can allow the cell to obtain large amounts of the protein they encode.
tandem clusters
In the mid-1990s, a sheep (Dolly) was successfully cloned using Somatic Cell Nuclear Transfer. In this technique,
the nucleus of an egg was removed and the egg was fused with a body cell.
A clear distinction between therapeutic cloning and reproductive cloning is that:
therapeutic cloning involves the eventual destruction of the embryo, whereas reproductive cloning does not
The embryonic stem cells growing in culture are induced to form a type of _____ needed by a patient.
tissue
The clones are created to have desirable genetic ____, such as the ability to make human proteins
traits
Bits of DNA that literally jump from one chromosome to another are
transposable elements
Examining the electrophoresis gel and reading from bottom to top, one base at a time, gives the sequence of DNA.
true
PCR can be used to amplify DNA from any source.
true
To sequence DNA by this method, the DNA must first be obtained in single-stranded form.
true
Because they are _____, cells from early stage embryos are able to develop into different types of tissues.
uncommitted
Scientists in Scotland figured out a novel method to clone cells successfully. It involved:
using an egg and a nucleus that were at the same stage of the cell cycle
Recombinant DNA can be used to create _______when viral genes are inserted into vector DNA and injected into individuals to produce an immune response.
vaccines
"Golden" rice is so-named because it contains:
vitamin A and iron
