UCSD Extension Biochem Quiz 1
Questions and Answers 2025-2026
Updated.
A salt (NaCl) crystal is sitting in a glass of water at room temperature. It's shape is changing, but
not it's volume. Which of the following are true?
A) The salt is dissolving from and crystallizing onto the crystal at the same rate
B) sodium and chloride ions are constantly attaching to and detaching from the crystal
C) sodium and chloride ions in the salt crystal are jiggling in accordance with the temperature of
the crystal
D) because the volume of the salt crystal is not changing, it must be in equilibrium
E)The atoms (ions) in a crystal of salt hovering in no gravity in a vacuum at room temperature
would be jiggling, even though they are not interacting with anything else.
F) the water in the glass would taste salty - Answer all true
10 angstroms equals _________ nanometer(s).
a) .01
b) 1
c) 0
d) 10
e) .1 - Answer 1 nanometer
the basic unit of life:
A) nucleic acid
B) cell
C) carbohydrate
D) DNA
E) protein - Answer cell
substances that affect energetic balance are most likely to target which of the following?
A) golgi apparatus
, E) nucleus - Answer mitochondrion
Which of the following is usually found as a single-stranded polymer with peptide-bond-linked
monomers?
A)DNA
B)RNA
C)carbohydrate
D)NONE OF THESE
E)ALL OF THESE
F) protein - Answer protein
An essential part of EVERY CELL:
A) nucleus
B)plasma membrane
C) cell wall
D) mitochondria
E) none of these
F) all of these - Answer plasma membrane
site where genetic information becomes a protein
A) plasma membrane
B) smooth ER
C) ribosome
D) DNA
E) nucleus - Answer ribosome
____ molecules in solution are driven together by entropy:
A) polar
B) ionic
C) hydrophilic
D) water
Questions and Answers 2025-2026
Updated.
A salt (NaCl) crystal is sitting in a glass of water at room temperature. It's shape is changing, but
not it's volume. Which of the following are true?
A) The salt is dissolving from and crystallizing onto the crystal at the same rate
B) sodium and chloride ions are constantly attaching to and detaching from the crystal
C) sodium and chloride ions in the salt crystal are jiggling in accordance with the temperature of
the crystal
D) because the volume of the salt crystal is not changing, it must be in equilibrium
E)The atoms (ions) in a crystal of salt hovering in no gravity in a vacuum at room temperature
would be jiggling, even though they are not interacting with anything else.
F) the water in the glass would taste salty - Answer all true
10 angstroms equals _________ nanometer(s).
a) .01
b) 1
c) 0
d) 10
e) .1 - Answer 1 nanometer
the basic unit of life:
A) nucleic acid
B) cell
C) carbohydrate
D) DNA
E) protein - Answer cell
substances that affect energetic balance are most likely to target which of the following?
A) golgi apparatus
, E) nucleus - Answer mitochondrion
Which of the following is usually found as a single-stranded polymer with peptide-bond-linked
monomers?
A)DNA
B)RNA
C)carbohydrate
D)NONE OF THESE
E)ALL OF THESE
F) protein - Answer protein
An essential part of EVERY CELL:
A) nucleus
B)plasma membrane
C) cell wall
D) mitochondria
E) none of these
F) all of these - Answer plasma membrane
site where genetic information becomes a protein
A) plasma membrane
B) smooth ER
C) ribosome
D) DNA
E) nucleus - Answer ribosome
____ molecules in solution are driven together by entropy:
A) polar
B) ionic
C) hydrophilic
D) water
