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TLS Online TPP Program

#Question id: 3943

In a cell that produces only one type of protein, which of the following statements about the relationship between hnRNA and mRNA is true?

#Unit 3. Fundamental Processes

  1. Heterogeneous nuclear RNA is always larger than mRNA.

  2. Heterogeneous nuclear RNA is always smaller than mRNA.

  3. Heterogeneous nuclear RNA and mRNA are typically the same size.

  4. There is no consistent relationship between the size of the two molecules.

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TLS Online TPP Program

#Question id: 11631

#Unit 8. Inheritance Biology

A cross between two green corn plants yields 23 progenies that are green and 13 progenies that are yellow. What is the genotype of the green progeny?
TLS Online TPP Program

#Question id: 14739

#Unit 4. Cell Communication and Cell Signaling

In heart muscle, activation series of the muscarinic acetylcholine receptor its effector K+ channel via the Gβγ subunit of a Gi protein.
a. Binding of acetylcholine triggers activation of the Gαi subunit and its dissociation from the Gβγ subunit in the usual way. 
b. The released Gβγ subunit (rather than Gαi∙GTP) binds to and opens the associated effector protein, a K+ channel. 
b. The increase in K+ permeability hyperpolarizes the membrane, which reduces the frequency of heart muscle contraction. 
d. Activation is terminated when the GTP bound to Gαi is hydrolyzed (by a GAP enzyme that is an intrinsic part of the Gαi subunit) to GDP and Gαi∙GDP recombines with Gβγ.
TLS Online TPP Program

#Question id: 24495

#Unit 3. Fundamental Processes

Which of the following step of splicing involves ATP
TLS Online TPP Program

#Question id: 27685

#Unit 10. Ecological Principles

Two different species can share the same niche, and survive together then these organisms undergo,
TLS Online TPP Program

#Question id: 2875

#Unit 2. Cellular Organization

Which of the following statements is/are CORRECT from the following?

I. The chromosome of the small monkey DNA virus SV40 is a circular, double-helical DNA molecule of 5000 bp.

II. The phage Lambda genome is a linear single-stranded molecule in the virion particle.

III. Circular DNA molecules purified from both bacteria and eukaryotes are usually negatively supercoiled, having values of sigma of approximately –0.06.

IV. Prokaryotes have a special type I topoisomerase known as “DNA gyrase” that introduces, rather than removes, negative supercoils.

V. DNA disentanglement, generally catalyzed by a type II topoisomerase, is also required for a successful round of DNA replication and cell division in eukaryotes.