bio 1 (15 multiple choice)

Project Description:

question 46
which of the following behaviors will not help prevent cancer?
question 46 options:

avoid carcinogenic chemicals

avoid excessive sunlight

lower total fat intake

decrease intake of high-fiber foods

increase consumption of broccoli

question 47
which of the following is not true of ribosomes?
question 47 options:

they are produced in the nucleus of a eukaryotic cell.

they are made of rna and proteins.

they are composed of two subunits that only come together when protein synthesis is about to occur.

they bind only one type of amino acid.

dna serves as a template for rrna.

question 48
when human dna is inserted into a bacterial plasmid the resulting bacterium will then
question 48 options:

produce the products of the gene that has been inserted.

be placed into a vaccine and used to fight off viruses that attack humans.

be used to study the evolutionary relationship between humans and bacteria.

produce restriction enzymes that will help fight off viruses that attack humans.

be used to create dna to insert the human genome.

question 49
the purpose of pcr is to create
question 49 options:

fragments of dna that are different lengths.

recombinant dna.

billions of copies of a segment of dna.

plasmids to be used as vectors in cloning.

transgenic crop plants.

question 50
in producing transgenic plants, cells called protoplasts are often used. protoplasts are plant cells from which the cell wall has been removed. why would the cell wall need to be removed?
question 50 options:

the foreign dna enters the cell through self-healing holes in the membrane but it could not pass through the cell wall.

the cell wall prevents the transgenic cell from growing into a mature plant.

the cell wall makes it difficult for the biotechnician to determine if the foreign dna has been incorporated into the cell’s genome

the cell wall prevents the microinjection of foreign dna into the cell because the needle cannot pass through it

the foreign dna passes through the plasmodesmata of the plant cell which is blocked by the cell wall.

question 51
transgenic crop plants have been created that do all of the following except
question 51 options:

grow two kinds of crops, like the pomato which produces both tomatoes and potatoes.

are resistant to insect damage.

are resistant to herbicides.

produce human hormones or antibodies.

transgenic plants have been produced that can do all of the things listed.

question 52
one of the problems that limits the use of gene therapy is
question 52 options:

the finding of suitable donors.

some patients are allergic to the bacterial dna used.

mutation of the patient’s genes caused by the therapy.

detrimental side effects from the inserted genes.

all of the above are problems with gene therapy.

question 53
the human genome project lead to the discovery that much of the genome consists of repeated sequences of nucleotides. these are thought to
question 53 options:

have no function.

function as protection on the ends of dna and as an attachment site on the centromere.

function in dna replication.

produce rrna.

function as a protection against cancer.

question 54
scientists now believe our genome to be three-dimensional. they believe the first dimension are the sections of dna that code for proteins, the second are the sequences that interrupt or separate these codes and the third is (are)
question 54 options:

coding sequences that were previously thought to code for "junk".

the proteins and chemicals surrounding and attached to the dna.

the sequence of nucleotides in our dna.

the structure and function of the proteins coded for by dna.

the many gene "deserts" whose functions are unknown.

question 55
which of the following is not used in the production of recombinant dna (rdna)?
question 55 options:

vectors

restriction enzymes

dna ligase

rna

plasmids

question 56
enzymes from the thermophile organism thermus aquaticus has allowed the development of which of the following procedures?
question 56 options:

genetic engineering

recombinant dna

dna cloning

polymerase chain reaction

protein synthesis

question 57
which of the following procedures would most likely be used to identify a specific individual of a population?
question 57 options:

dna cloning

transgenic dna

polymerase chain reaction

dna fingerprinting

genetic engineering

question 58
in dna fingerprinting the products of pcr are cut by restriction enzymes into unique lengths; these fragments are then
question 58 options:

subjected to fluorescent dyes and visualized under an electron microscope.

separated according to their relative positive and negative charges.

separated according to the lengths of the fragments.

arranged into a karyotype.

used to produce the genes that give the individual a unique set of fingerprints.

question 59
all of the uses listed below are uses for transgenic bacteria, except
question 59 options:

bioremediation, when bacteria are used to clean up spills of oil or other toxic substances.

the production of organic chemicals such as phenylalanine used in the production of aspartame.

the production of chemicals toxic to insects that can be used to protect plants from insects.

the production of plants like the pomato, it has a starchy root like the potato and also produces tomatoes on the stem portion of the plant.

question 60
all of the following are benefits of sequencing the human genome except
question 60 options:

knowing the exact sequence of dna in an individual could allow pharmaceutical companies to design drugs for their exact genotype.

the discovery of the chemical makeup of dna.

determining individuals who have a predisposing factor that could lead to future illness could allow for earlier treatment.

the improvement of sequencing technology that will allow the genomes of other species to be more readily sequenced.
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