The full form of ELSI is:

(a) Embedded Low Software Index     (b) Ear Lung Spleen Immunity

(c) Ethical Legal and Social Issue       (d) Endonuclease Ligase Surface Immunity

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DNA fingerprinting works because:
(a) Genes containing the same alleles make it simple to compare different individuals
(b) PCR allows amplification of proteins from single cells
(c) There are multiple alleles for some DNA sequences, making it possible to obtain unique patterns for each individual
(d) DNA in the skin cells is very diverse

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DNA replication in eukaryotes differs from replication in bacteria because:
(a) Synthesis of the new DNA strand is from 3' to 5' in eukaryotes and from 5' to 3' in bacteria
(b) Synthesis of the new DNA strand is from 5' to 3' in eukaryotes and from 3' to 5' in bacteria
(c) There are many replication forks in each eukaryotic chromosome and only one in bacterial DNA
(d) Synthesis of the new DNA strand is from 5' to 3' in eukaryotes and is random in prokaryotes

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Mutations are:
(a) Heritable changes in the sequence of DNA bases that produce an observable phenotype
(b) Heritable changes in the sequence of DNA bases
(c) Mistakes in the incorporation of amino acids into proteins
(d) Heritable changes in the mRNA of an organism

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You have analyzed the DNA isolated from a newly discovered virus and found that its base composition is 32% A, 17% C, 32% G, and 19% T. What would be a reasonable explanation of this observation?
(a) The virus must be extraterrestrial
(b) In some viruses, double-stranded DNA is made up of base pairs containing two purines or two pyrimidines
(c) Some of the T was converted to C during the isolation procedure
(d) The genome of the phage is single-stranded not double-stranded

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The energy necessary for making a DNA molecule comes directly from the:

(a) Sugar                                           (b) ATP

(c) Release of phosphates                    (d) NADPH

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The force that holds DNA together in a double helix is:

(a) The force of the twist                    (b) Covalent bonds

(c) Ionic bonds or ionic interactions    (d) Hydrogen bonds

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The enzyme that unwind the DNA prior to replication is called:

(a) DNA polymerase III                       (b) DNA ligase

(c) Primase                                        (d) Helicase

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If Hershey and Chase had found 'S in both the pellet and the supernatant, the conclusion about the nature of DNA replication would be that:
(a) Protein must be the information molecule
(b) It would be difficult to conclude anything from these results
(c) DNA is the genetic information molecule
(d) Phage must have stuck to the bacteria

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Experiments by Avery, Macleod, and McCarty supported DNA as the genetic material by showing that:
(a) Both protein and DNA samples provided the transforming factor
(b) DNA was not complex enough to be the genetic material
(c) Only samples with DNA provided transforming activity
(d) Even though DNA was molecularly simple, it provided adequate variation to act as the genetic material

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