SACS Questions

Questions and Answers

A weak electrostatic attraction between one electronegative atom (such as oxygen or nitrogen) and a hydrogen atom covalently linked to a second electronegative atom

Hydrogen bond (correct)

the type of protein, often composed of multiple subunits, that exists in two or more conformations depending upon the binding of a specific ligand at a site other than the catalytic site is a(n)_____.

Allosteric (correct)

Which of the following statements regarding DNA replication is TRUE?

new DNA strands must be copied from a DNA template

(correct)

The initiation of transcription of a gene encoding for protein in eukaryotic cell requires the following except

Helical and primase Signup and view all the answers

Which of the following cellular components is NOT required to make ATP by chemiosmosis?

CO2 Signup and view all the answers

For initiation of protein synthesis in eukaryotes, the following sequence applies

the small ribosomal subunit bind mRNA, followed by tRNA-Met and the large ribosomal subunit Signup and view all the answers

Which of the following statements is correct regarding ATP driven pumps?

eukaryotic cells contain a variety of ATP driven pumps including Na+'K+ ATPase, Ca++ ATPase and H+ ATPase Signup and view all the answers

The fluidity of a membrane is increased by

Unsaturated fatty acids Signup and view all the answers

Which of the following statements regarding signal transduction cascades is FALSE?

second messengers relay the signal from the plasma membrane to the cell's interior Signup and view all the answers

cyclin(s) _______

levels fluctuate during the cell cycle Signup and view all the answers

Study Notes

Molecular Interactions

A weak electrostatic attraction exists between an electronegative atom (such as oxygen or nitrogen) and a hydrogen atom covalently linked to a second electronegative atom.

Protein Structure and Function

Allosteric proteins exist in two or more conformations depending on the binding of a specific ligand at a site other than the catalytic site.

DNA Replication

One true statement regarding DNA replication is not specified.

Transcription Initiation

The initiation of transcription of a gene encoding a protein in eukaryotic cells requires the presence of all factors except one.

ATP Synthesis

One cellular component is not required to make ATP by chemiosmosis.

Protein Synthesis

The sequence of initiation of protein synthesis in eukaryotes follows a specific order.

ATP-Driven Pumps

One correct statement regarding ATP-driven pumps is specified.

Membrane Fluidity

The fluidity of a membrane is increased by a specific factor.

Signal Transduction Cascades

One false statement regarding signal transduction cascades is specified.

Cell Cycle Regulation

Cyclin(s) play a specific role in the cell cycle.