Practice Questions

TLS Online TPP Program

#Question id: 13108

With the help of DNA fingerprinting which can be used to determine paternity. There are three babies (Baby A, Baby B and Baby C) in a maternity ward, and three sets of confused and worried parents. (Father and Mother #1 are a couple, as are Father and Mother #2, and Father and Mother #3.)
You do each PCR reaction on chromosome 15 and load each one into a separate well of an agarose gel, and then run the gel.

Why is it that some people show three bands?

#Unit 13. Methods in Biology

The more repeats you have, the longer your DNA fragment is, and longer DNA fragments migrate more slowly in gels.
They are heterozygotes at this region.
They are homozygotes at this region.
They are heterozygotes, and possess one allele that can be cut and one allele that cannot be cut.

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TLS Online TPP Program

#Question id: 1352

#Unit 4. Cell Communication and Cell Signaling

Actin filaments are to focal adhesions as _____ are to hemidesmosomes.

TLS Online TPP Program

#Question id: 1353

#Unit 4. Cell Communication and Cell Signaling

If a laboratory mouse had a mutation rendering the gene that codes for the L-selectin protein nonfunctional, which of the following symptoms would the animal exhibit?

TLS Online TPP Program

#Question id: 1354

#Unit 4. Cell Communication and Cell Signaling

Calcium-dependent adhesion is to the cadherins as calcium-independent adhesion is to the ? .

TLS Online TPP Program

#Question id: 1355

#Unit 4. Cell Communication and Cell Signaling

To which category of proteins listed below are NCAM and VCAM most closely related?

TLS Online TPP Program

#Question id: 1356

#Unit 4. Cell Communication and Cell Signaling

Which of the following cell types might have the highest number of desmosomes?