TLS Online TPP Program

#Question id: 129


Glycine is not a stereoisomer because

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. it has no chiral carbon.

  2. it does not form enantiomers.

  3. it does not exist in two non-superimposable mirror-image forms.

  4. All of the above

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TLS Online TPP Program

#Question id: 3838

#Unit 3. Fundamental Processes

Which of the following statements correctly describes the difference between the leading and the lagging strands of DNA during DNA replication?

TLS Online TPP Program

#Question id: 3839

#Unit 3. Fundamental Processes

Use the figure to answer the following question. In the late 1950s, Meselson and Stahl grew bacteria in a medium containing "heavy" (radioactive) nitrogen (15N) and then transferred them to a medium containing 14N (nonradioactive). Which of the results in the figure would be expected after one round of DNA replication in the presence of 14N?

TLS Online TPP Program

#Question id: 3840

#Unit 3. Fundamental Processes

The mechanism of DNA replication is studied in an E. coli replication fork. When will this fork stop replicating DNA?

TLS Online TPP Program

#Question id: 3841

#Unit 3. Fundamental Processes

The DNA replication occurs in a semi-conservative manner which means

TLS Online TPP Program

#Question id: 3842

#Unit 3. Fundamental Processes

Which of the following statements correctly describes the difference between the leading strand and the lagging strand in DNA replication?

TLS Online TPP Program

#Question id: 3843

#Unit 3. Fundamental Processes

In DNA replication in E. coli, the enzyme primase is used to attach a 5 to 10 base ribonucleotide strand complementary to the parental DNA strand. The RNA strand serves as a starting point for the DNA polymerase that replicates the DNA. If a mutation occurred in the primase gene, which of the following results would you expect?