Practice Questions

TLS Online TPP Program

#Question id: 1974

A person exposed to a new cold virus would not feel better for one to two weeks because

#Section 2: General Biology

specific B cells and T cells must be selected prior to a protective response.
it takes up to two weeks to stimulate immunologic memory cells.
no memory cells can be called upon, so adequate response is slow.
antigen receptors are not the same as for a flu virus to which she has previously been exposed.

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#Question id: 12910

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

A. RNA analysis	i. Sexing or cell mutation sites	a. Expressed Sequence tag
B. Forensic science	ii. mRNA analysis	b. Analysis of DNA from blood
C. Gene discovery	iii. DNA profiling	c. Active latent viral infections
D. Single-cell analysis	iv. RT–PCR	d. Sex determination of unborn

#Question id: 12911

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

A. DNA polymerases	i. Alkaline phosphatase	a. RNA-dependent DNA polymerase, used in cDNA synthesis
B. Reverse transcriptase	ii. T4 DNA ligase	b. Thermostable DNA polymerase used in PCR
C. Ligases	iii. AMV-RT	c. Removes 5'-phosphates from DNA and RNA
D. Phosphatases	iv. Taq DNA pol	d. Links 5'-phosphate and 3'-hydroxyl ends via phosphodiester bond