TLS Online TPP Program

#Question id: 66


Which of the following statements regarding isomerism is incorrect regarding biomolecules?

#Section 2: General Biology
  1. Stereoisomers that are mirror images of each other are called enantiomers.

  2. A carbon atom with four different substituents is said to be asymmetric, and asymmetric carbons are called chiral centers.

  3. Pairs of stereoisomers that are not mirror images of each other are called diastereomers.

  4. An equimolar solution of the two enantiomers (a racemic mixture) rotates the plane of plane-polarized light in a particular direction.

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TLS Online TPP Program

#Question id: 3749

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following statements describes the process of transformation in bacteria?

TLS Online TPP Program

#Question id: 3750

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following facts did Hershey and Chase make use of in trying to determine whether DNA or protein is the genetic material?

TLS Online TPP Program

#Question id: 3752

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following investigators was (were) responsible for the discovery that in DNA from any species, the amount of adenine equals the amount of thymine, and the amount of guanine equals the amount of cytosine?

TLS Online TPP Program

#Question id: 3753

#Section 3: Genetics, Cellular and Molecular Biology

Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?

TLS Online TPP Program

#Question id: 3754

#Section 3: Genetics, Cellular and Molecular Biology

Thymine makes up 28% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be guanine?

TLS Online TPP Program

#Question id: 3755

#Section 3: Genetics, Cellular and Molecular Biology

In E. coli, there is a mutation in a gene called dnaB that alters the helicase that normally acts at the origin of replication. Which of the following events would you expect to occur as a result of this mutation?