DNA was isolated from three different cell types of the same organism, the relative DNA content for each type was determined, and the results were plotted on the graph shown in the figure below. Refer to the graph to answer the following questions. Which sample of DNA might be from a cell that stopped the process of cell division in G0 phase of the cell cycle prior to meiosis?

TLS Online TPP Program

#Question id: 23883

#Unit 13. Methods in Biology

A paleontologist has recovered a bit of tissue from the 400-year-old preserved skin of an extinct dodo (a bird). The researcher would like to compare a specific region of the DNA from the sample with DNA from living birds. Which of the following would be most useful for increasing the amount of dodo DNA available for testing?

TLS Online TPP Program

#Question id: 23884

#Unit 13. Methods in Biology

Expression of a cloned eukaryotic gene in a bacterial cell involves many challenges. The use of mRNA and reverse transcriptase is part of a strategy to solve the problem of

TLS Online TPP Program

#Question id: 23885

#Unit 13. Methods in Biology

DNA technology has many medical applications. Which of the following is not done routinely at present?

TLS Online TPP Program

#Question id: 23886

#Unit 13. Methods in Biology

In recombinant DNA methods, the term vector can refer to

TLS Online TPP Program

#Question id: 23887

#Unit 13. Methods in Biology

Which of the following sequences in double-stranded DNA is most likely to be recognized as a cutting site for a restriction enzyme? 

TLS Online TPP Program

#Question id: 23888

#Unit 13. Methods in Biology

A recessive allele usually results from a mutation that

a. disrupts expression of the gene.

b. alters the structure of the encoded protein leading to gain of function.

c. alters the structure of the encoded protein leading to loss of function.

d. increases the activity of the encoded protein.