Which of the following can lead to loss-of-heterozygosity in a tumor-suppressor gene?

a. deletion of the normal copy                       

b. non dysjunction during mitosis

c. somatic mutation of the normal copy

d. mitotic recombination between a wild-type and mutant allele

TLS Online TPP Program

#Question id: 2290

#Unit 1. Molecules and their Interaction Relevant to Biology

The cytoskeleton includes all of the following except

TLS Online TPP Program

#Question id: 10183

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is the major lipid of lung surfactant, that is essential for normal pulmonary function?

TLS Online TPP Program

#Question id: 2979

#Unit 2. Cellular Organization

Use the data in the accompanying table to answer the question. Minutes Spent in Cell Cycle Phases-

Cell type	G1	S	G2	M
Beta	18	24	12	16
Delta	100	1	0	0
Gamma	18	48	14	20

The data in the table were obtained from a study of the length of time spent in each phase of the cell cycle by cells of three eukaryotic organisms designated beta, delta, and gamma. What is the best explanation for the data associated with delta cells?

TLS Online TPP Program

#Question id: 10815

#Unit 10. Ecological Principles

The evolution of two interacting species in a community is referred to as ________________.

TLS Online TPP Program

#Question id: 226

#Unit 1. Molecules and their Interaction Relevant to Biology

Which in not a lipid-soluble vitamin?