Practice Questions

TLS Online TPP Program

#Question id: 1509

Cells that are infected, damaged, or have reached the end of their functional life span often undergo "programmed cell death." This controlled cell suicide is called apoptosis. Select the appropriate description of this event on a cell's life cycle.

#Unit 4. Cell Communication and Cell Signaling

Apoptosis is regulated by cell surface receptors that signal when a cell has reached its density-dependent limits.
During apoptosis, dying cells leak out their contents, including digestive enzymes that also destroy healthy cells.
During apoptosis, cellular agents chop up the DNA and fragment the organelles and other cytoplasmic components of a cell.
Each cell organelle has protein signals that initiate the breakdown of the organelle's components, which leads to cell death.

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TLS Online TPP Program

#Question id: 5846

#Unit 8. Inheritance Biology

The bacteriophage can lysogenize after infecting a bacterium, i.e. integrate into the host bacterial chromosome by site-specific recombination, and may reside there for many generations before an excision event regenerates the viral genome in an infective form. Which one of the following is not a component of these events?

TLS Online TPP Program

#Question id: 5847

#Unit 8. Inheritance Biology

A Holliday structure is a(n)

TLS Online TPP Program

#Question id: 15195

#Unit 8. Inheritance Biology

In the following pedigree shows the segregation of two different recessive traits.

Assuming that both traits are due to linked autosomal genes that are 10 cM apart, calculate the probability that the indicated child will have both recessive traits.

TLS Online TPP Program

#Question id: 15196

#Unit 8. Inheritance Biology