10 Jun In human genome there is high probability that a random mutation
Question
(1) In human genome there is high probability that a random mutation will occur in any given gene.
a. true
b. false
(2) The following enzyme breaks down the starch.
a. catalase
b. none of the choices are correct
c. amylase
d. pepsin
(3) Genetic messages are hidden in the form of codon. Each codon is composed of
a. 4-6 nucleotides
b. 4 nucleotides
c. 3-5 nucleotides
d. 3 nucleotides
(4) A scientific lab report has different requirements that need to becovered than in a English or History report.
a. true
b. false
(5) DNA bases pair with each other in the following fashion.
G and G pair together; and, A and A pair together
a. true
b. false
(6) Amylase is an enzyme
a. true
b. false
(7) The green light has a wave length of 515 um.
a. true
b. false
(8) 94 m = 9.4×10000?m
a. true
b. false
(9) The process by which molecules from an area of high solvent concentration moves to an area of low solvent concentration via a semipermeable membrane is called diffusion.
a. true
b. false
(10) Both natural vegetation and crops are affected by acid rain.
a. true
b. false
(11) In a scientific experiment a control treatment alway contain
a. everything except the factor being tested
b. the factor being tested
c. nothing
d. water
(12) A scientific experiment
a. sometimes has only independent variable
b. always has independent and dependent variables
c. sometimes has only dependent variables
(13) Organisms heterozygous for a recessive trait are often called carriers of that trait.
a. true
b. false
(14) As cells grow, the exchange of nutrients and wastes decreases in efficiency
a. true
b. false
(15) DNA sequence is always read 3 nucleotides at a time.
a. true
b. false
(16) 0.1 cm =
a. 10um
b. 100 um
c. 1000 um
d. 10,000 um
(17) The rate of diffusion is directly related to the difference in the concentration between the two liquids (inside the cell and outside the cell). The greater this difference, the greater the rate of diffusion.
a. true
b. false
(18) In general, only 1 out of 3 mutations that occur in a gene result in a change to the protein structure
a. true
b. false
(19) It is important that any negative and unexpected result is not included in a lab report
a. true
b. false
(20) The cell membrane in human cells allows all substances to pass through it
a. true
b. false
(21) Inclusion of control treatment is preferred but a good reproducible scientific experiment can be performed without a control treatment.
a. true
b. false
(22) Enzyme activity can not be increased by including the following in the reaction
a. increasing the temperature
b. by adding more enzyme than it needed
c. substrate
d. by adding vitamin or a cofactor
e. increasing concentration of enzyme
(23) The frame hift mutation will have minimum effect on the DNA sequence
a. true
b. false
(24) Acid rain has a pH of
a. 4-5
b. 3-8
c. 4-6
d. 2-3
(25) As cells grow, the exchange of nutrients and wastes increases in efficiency
a. true
b. false
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