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TLS Online TPP Program

#Question id: 3672

During initiation of replication

#Unit 3. Fundamental Processes

  1. DNA polymerases denature A-T rich sequences at the origin.

  2. replication begins when DnaA protein binds the origin and synthesizes primers.

  3. DnaB protein cleaves the double-helix to produce template strands.

  4. two replication forks need to be created to establish bidirectional replication.

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TLS Online TPP Program

#Question id: 56

#Unit 1. Molecules and their Interaction Relevant to Biology

Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?
TLS Online TPP Program

#Question id: 2830

#Unit 2. Cellular Organization

The NtrC protein from E. coli
a. is a σ54 RNA polymerase.             
b. stimulates transcription of the glnA gene.
c. is activated by a protein kinase called NtrB.
d. binds both to an enhancer site upstream of the glnA gene and to RNA polymerase.
e. has ATPase activity.
TLS Online TPP Program

#Question id: 3536

#Unit 8. Inheritance Biology

What is the probability that selfing an F1 plant from Mendel dihybrid cross ( RrYy X RrYy) will produce an offspring with an rrYY genotype?
TLS Online TPP Program

#Question id: 523

#Unit 1. Molecules and their Interaction Relevant to Biology

Compared to pyruvate, the carbon atoms in lactate ________.
TLS Online TPP Program

#Question id: 29014

#Unit 7. System Physiology – Animal

25-hydroxycholecalciferol is converted to the more active metabolite 1,25-dihydroxycholecalciferol in which of the following cell ?