Biology Test 312

Directions For Questions

Consider the following statement, how many statements are correct -

(A) More than 900 restriction enzymes have been isolated from 230 strains of bacteria

(B) plasmid having functional origin can not use host DNA polymerase to replicate

(D) Recombinant plasmid will not obtain if source of gene and plasmid will cut with different R.E

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Biology Test 31...

Question 1

It acts as a natural genetic engineer by transferring T-DNA to plant cells.

It is used to induce disease resistance in plants.

It serves as a host for the growth of plant tissues.

It is used to directly increase the nutritional value of plants.

Question 2

They can be used for pets with enhanced features.

They provide a model for studying human diseases.

They increase the biodiversity of animal species.

They can be used to produce non-biological products.

Question 3

To increase the size of the plants

To produce hybrids by fusing somatic cells from two different species or varieties

To enhance the photosynthesis rate

To reduce the time needed for plant growth

Question 4

It can not use as a vector to transfer foreign gene in host bacterium

foreign gene can be ligated at any point in plasmid

plasmid is not efficiently transfer into host cell through transformation

Small size of plasmid also confer benefit to use it in genetic engineering

Question 5

It is used as a vector to introduce new genes into animal cells.

It serves as a marker for selecting successful hybrid plants.

It is used as a vector to transfer genes into plant cells.

It increases the nutritional value of the plasmid.

Question 6

sticky ends are sticky because they can link to complimentary DNA with H-bond

sticky ends generated when restriction enzyme cut in centre of palindrome sequence

one type of restriction enzyme can produce same sticky end on two different DNA piece

nucleases always break phosphodiester bond in polynucleotide chain

Question 7

The potential for increased animal intelligence

The possibility of creating new animal species

The welfare and suffering of the animals involved

The impact on natural animal populations

Question 8

endonuclease and methylase - 1965

Taq polymeraase and methylase - 1974

exonuclease and methylase - 1963

methylase and endonuclease - 1963

Question 9

Enhancing physical attributes in humans

Treating or preventing diseases by correcting defective genes

Increasing lifespan

Improving cognitive abilities

Question 10

one

two

three

all are wrong

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