GENERAL BIOLOGY 2 THIRD QUARTER SUMMATIVE TEST
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Measures 11 skills fromGrade 11-12Biology IIPhilippines Curriculum: SHS Specialized Subjects (MELC)
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Which of the following is described as the process of manipulating genes, that are usually outside the normal reproductive process?29
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Which of the following is described as the process of manipulating genes, that are usually outside the normal reproductive process?
Which of the following is the enzyme that is used to remove or knockout genes?
What is the role of Agrobacterium tumefaciens in the production of transgenic plants?
A. tumefaciens is used as a carrier to move genes into plant cells.
A. tumefaciens makes transgenic plants resistant to pests.
Plant genes are incorporated into the genome of Agrobacterium tumefaciens.
Genes from A. tumefaciens are inserted into plant DNA to give the plant different traits.300sSTEM_BIO11/12-IIIa-b-6
In gel electrophoresis of DNA, the different bands in the final gel form because the DNA molecules __________.
have different nucleotide compositions
are from different organisms
have different genes
have different lengths300sSTEM_BIO11/12-IIIa-b-6
In order to insert a foreign gene into a plasmid, both must __________.
be of the same length
originate from the same type of cell
be cut by the same restriction enzyme
have identical DNA sequences300sSTEM_BIO11/12-IIIa-b-7
Which of the following is the most important discovery that led to the development of rDNA technology?
Discovery of restriction enzyme
Discovery of plasmid
Discovery of ligase enzyme
Discovery of the DNA double helix300sSTEM_BIO11/12-IIIa-b-7
Which of the following statements about rDNA technology is TRUE?
i. rDNA technology is used to obtain large number of copies of specific DNA fragments.
ii. rDNA technology is used to obtain large quantities of proteins produced by the concerned gene.
iii. rDNA technology is used to integrate gene of interest into chromosomes where it expresses itself.
i and ii only
All of them
ii and iii only
None of them300sSTEM_BIO11/12-IIIa-b-7
Which of the following represents the longest time period?
We cannot accurately measure time in years with stratigraphy for several reasons. Which of the following statements is FALSE?
Sediments accumulate at different rates in different sedimentary environments.
Stratigraphy alone cannot be used to determine the relative ages of widely separated beds.
The rock record does not tell us how many years have passed between periods of deposition.
Many sedimentary rocks contain fossils that have not been identified.300sSTEM_BIO11/12-IIIc-g-8
An undeformed sedimentary layer is __________ than the layer above and __________ than the layer below.
How do gene mutations contribute to evolution?
Beneficial and unfavorable mutations take hold in the population equally over numerous generations.
Unfavorable mutations have a more significant effect on genes than do favorable mutations, so they are spread through the population.
Natural selection favors beneficial mutations, so they survive and are passed on to future generations.
Beneficial mutations are passed on to several members of a generation, quickly taking hold in a population.300sSTEM_BIO11/12-IIIc-g-9
If p equals the frequency of the dominant allele and q equals the frequency of the recessive allele, which of the following terms represents the frequency of the individuals who show the dominant phenotype?
p2 + q2 + 2pq
p2 + 2pq
p2 + q2
q2 + 2pq300sSTEM_BIO11/12-IIIc-g-9
A survey reveals that 25% of a population of 1 000 individuals have attached earlobes (are homozygous recessive for the trait). If the population fits the parameters of Hardy-Weinberg law, which of the following is the frequency of the recessive allele?
In certain Native American groups, albinism due to a homozygous recessive condition in the biochemical pathway for melanin is sometimes seen. If the frequency of the allele for this condition is 0.06, which of the following is closest to the frequency of the dominant allele in this population, assuming that the population is in Hardy-Weinberg equilibrium?
In the wild, two bird species are found living in the same tree and appear to be reproductively isolated. In captivity, it is found that the two species can breed and form viable, fertile offspring. Which one is most likely their natural reproductive barrier?
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