PCB 4023 Practice Exam 1

Despite the diversity, cells resemble each other to an astonishing degree in their chemistry. For example, only four _____ are used to make DNA.

• dNTP

• NTP

• amino acid

• monosaccharide

• fatty acid

The _____ is made up of two concentric membranes and is continuous with the membrane of the endoplasmic reticulum.

• nuclear envelope

• plasma membrane

• Golgi network

• mitochondrial membrane

Ionic bonds form a ___.

• Salt

• Molecule

• Polymer

• Lipid bilayer

Tags

NGSS.HS-PS1-3

The side chain of the amino acid R under pH 7 is ___.

• Nonpolar

• Negatively charged

• Positively charged

• Polar but uncharged

Which of the following amino acid side chain can be phosphorylated by a protein kinase?

• C

• F

• D

• Y

Hydrogen bonds are essential to form a(n) _____

• alpha-helix

• lipid bilayer

• salt

• polypeptide

Which of the following protein is necessary to stop a mitogenic signaling by dissociating a SH2 domain containing protein (Grb2) from phosphorylated Growth factor receptor?

• a lipid kinase

• a protein kinase

• a lipid phosphatase

• a protein phosphatase

Which of the following is mainly mediated by an ionic bond?

• Grb2 and SOS association

• Growth factor & Receptor Tyrosine Kinase association

• Phospho-tyrosine and SH2 domain association

• SOS and Ras association

Tags

NGSS.HS-PS1-2

Protein A binds to protein B to form a complex, AB. At equilibrium in a cell, A, B, and AB concentrations are all at 10 nM. Calculate the equilibrium constant for the reaction A + B ↔ AB

Tags

NGSS.HS-PS1-5

Choose an example of a motor protein.

• Myosin II

• Insulin

• Sodium potassium ATPase

• EGFR