Cell & Molecular Biology Exam 1
UPDATED ACTUAL Questions and
CORRECT Answers
Based on the primer on scale and approximation, the length of a ribosome is approximately ____
orders of magnitude smaller than the length of a eukaryotic cell and approximately ____ orders
of magnitude larger than the length of an amino acid. - CORRECT ANSWER - 3,2
Translation is the process by which: - CORRECT ANSWER - proteins are synthesized
from RNA molecules.
All organisms use which of the following molecules to carry out cellular work such as growth
and moving stubtances? - CORRECT ANSWER - ATP
A major difference between eukaryotic cells and prokaryotic cells is that: - CORRECT
ANSWER - eukaryotic cells have a nucleus and prokaryotic cells do not.
True or false: Observations allow scientists to draw tentative explanations called hypotheses -
CORRECT ANSWER - true
What are some key features of individual cells? - CORRECT ANSWER - the ability to
harvest and transform energy from the environment, the ability to store and transit information
using nucleic acids, the presence of a plasma membrane.
Nucleic acids are important information storage molecules present in virtually every cell. Which
processes are carried out by a cell when it accesses that information in the DNA of the genes? -
CORRECT ANSWER - transcription and translation
The energy before a chemical reaction and the energy after a chemical reaction is the same. This
is an example of: - CORRECT ANSWER - the first law of thermodynamics
, If you were to compare the entropy of a dog to that of a bucket of water, what would be TRUE? -
CORRECT ANSWER - The entropy of the bucket of water would be greater
Imagine that a researcher claimed to have created a genetically modified plant that produces
twice as much energy as it harnesses from its environment. How could this be possible? -
CORRECT ANSWER - This is not possible because such a plant would violate the second
law of thermodynamics.
The three main groups, or domains, of organisms are: - CORRECT ANSWER - bacteria,
archaea, and eukaryotes
A mutation in _____ results in a change in _____ that sometimes produces a(n) _____ with
altered structure and function. - CORRECT ANSWER - DNA; RNA; protein
What does NOT possess the ability to synthesize its own proteins? - CORRECT
ANSWER - a virus
Which of the domains do the cells store their genetic information in a nucleus? - CORRECT
ANSWER - Eukarya
At some point in their life cycle, all cells have a _____, whereas not all cells have a(n) _____. -
CORRECT ANSWER - plasma membrane; nuclear membrane
Which one of the following represents the pH of a solution with the HIGHEST concentration of
hydrogen ions? (9.1, 7.0, 1.0, 4.5, 11.5) - CORRECT ANSWER - 1.0 pH
Of the following types of bonds between atoms, which is the STRONGEST? (hydrogen bond,
ionic bond, covalent bond, van Der Waals interaction) - CORRECT ANSWER - covalent
bond
The ability of atoms to form bonds is due largely to electrons farthest from the nucleus. These
electrons are called ________ electrons. - CORRECT ANSWER - valence
UPDATED ACTUAL Questions and
CORRECT Answers
Based on the primer on scale and approximation, the length of a ribosome is approximately ____
orders of magnitude smaller than the length of a eukaryotic cell and approximately ____ orders
of magnitude larger than the length of an amino acid. - CORRECT ANSWER - 3,2
Translation is the process by which: - CORRECT ANSWER - proteins are synthesized
from RNA molecules.
All organisms use which of the following molecules to carry out cellular work such as growth
and moving stubtances? - CORRECT ANSWER - ATP
A major difference between eukaryotic cells and prokaryotic cells is that: - CORRECT
ANSWER - eukaryotic cells have a nucleus and prokaryotic cells do not.
True or false: Observations allow scientists to draw tentative explanations called hypotheses -
CORRECT ANSWER - true
What are some key features of individual cells? - CORRECT ANSWER - the ability to
harvest and transform energy from the environment, the ability to store and transit information
using nucleic acids, the presence of a plasma membrane.
Nucleic acids are important information storage molecules present in virtually every cell. Which
processes are carried out by a cell when it accesses that information in the DNA of the genes? -
CORRECT ANSWER - transcription and translation
The energy before a chemical reaction and the energy after a chemical reaction is the same. This
is an example of: - CORRECT ANSWER - the first law of thermodynamics
, If you were to compare the entropy of a dog to that of a bucket of water, what would be TRUE? -
CORRECT ANSWER - The entropy of the bucket of water would be greater
Imagine that a researcher claimed to have created a genetically modified plant that produces
twice as much energy as it harnesses from its environment. How could this be possible? -
CORRECT ANSWER - This is not possible because such a plant would violate the second
law of thermodynamics.
The three main groups, or domains, of organisms are: - CORRECT ANSWER - bacteria,
archaea, and eukaryotes
A mutation in _____ results in a change in _____ that sometimes produces a(n) _____ with
altered structure and function. - CORRECT ANSWER - DNA; RNA; protein
What does NOT possess the ability to synthesize its own proteins? - CORRECT
ANSWER - a virus
Which of the domains do the cells store their genetic information in a nucleus? - CORRECT
ANSWER - Eukarya
At some point in their life cycle, all cells have a _____, whereas not all cells have a(n) _____. -
CORRECT ANSWER - plasma membrane; nuclear membrane
Which one of the following represents the pH of a solution with the HIGHEST concentration of
hydrogen ions? (9.1, 7.0, 1.0, 4.5, 11.5) - CORRECT ANSWER - 1.0 pH
Of the following types of bonds between atoms, which is the STRONGEST? (hydrogen bond,
ionic bond, covalent bond, van Der Waals interaction) - CORRECT ANSWER - covalent
bond
The ability of atoms to form bonds is due largely to electrons farthest from the nucleus. These
electrons are called ________ electrons. - CORRECT ANSWER - valence
