exam 1 MC bio 151 Flashcards
A solution with pH=8.4 will have [H3O+] = _____.
A. 8.4^10
B. 8.4^–10
C. 10^8.4
D. 10^–8.4
D. 10^–8.4
The Universal Tree of Life has three main branches
called “domains.” Which of the following is NOT a
domain?
A. Bacteria
B. Archaea
C. Eukarya
D. Protista
D. Protista
All cells in the body have identical (99.99%) ____.
A. Protein sequences
B. DNA sequences
C. mRNA sequences
D. Lipids
E. Carbohydrates
B. DNA sequences
Which of the following conditions is necessary for
natural selection to occur?
A. Some individuals in the population must have
higher survival than others.
B. Individuals must be able to select their mates.
C. Individuals in a population must vary.
D. The population must be increasing in size
C. Individuals in a population must vary.
The following functional group is ____.
A. Aldehyde
B. Carbonyl
C. Ketone
D. Carboxylic
D. Carboxylic
Which of the following is incorrect about some
phylogenetic tree? Phylogenetic tree depicts ____.
A. relationships between species
B. approximate time when phyla separated
C. all species that have ever lived on the planet
D. clades that share a recent common ancestor
E. how some species are more closely related
C. all species that have ever lived on the planet
Which of the following is not needed for a theory?
A. A lot of evidence
B. Pattern in nature
C. Process
D. Hypothesis
E. Explain a phenomenon
D. Hypothesis
The following functional group is ____. (R-S-H)
A. Amine
B. Carbonyl
C. Carboxylic
D. Phosphate
E. Thiol
E. Thiol
Which of the following is not a fundamental
characteristic of all living organisms
A. Evolution
B. Energy utilization
C. Optimization
D. Information processing
E. Replication
C. Optimization
Which of the following is correct?
A. Evolution is progressive, meaning that species
always get larger, more complex, or “better” in
some sense
B. Evolution is a change in the characteristics of a
population over time
C. Individuals as well as populations change when
natural selection occurs
D. Individuals with high levels of fitness are stronger,
bigger or “more dominant”
B. Evolution is a change in the characteristics of a
population over time
Which of the following is LEAST needed for
establishing a theory? (think “pioneer scientists”)
A. A textbook on the topic
B. Process
C. Alternative hypotheses and tests
D. Experiments to test parts of the theory
E. Pattern
A. A textbook on the topic
How does a scientific theory differ from a scientific
hypothesis?
A. Theories define scientific laws; hypotheses are
used to set up experiments.
B. A theory is an explanation for a very general
phenomenon or observation; hypotheses treat
more specific observations.
C. A hypothesis is an explanation for a very general
phenomenon; theories treat more specific
issues.
D. There is no difference - the terms are
interchangeable.
B. A theory is an explanation for a very general
phenomenon or observation; hypotheses treat
more specific observations.
The mass of _____ are not used to calculate the
atomic mass.
A. Protons
B. Electrons
C. Neutrons
D. Neutrons + electrons
E. Protons + neutrons
B. Electrons
Which of the following statements about neutrons
is false?
A. A neutron has no electrical charge.
B. The symbol of a neutron is n.
C. The neutron is found in the nucleus of an atom.
D. The number of neutrons is not dependent on the
number of protons.
E. The atomic number is the number of
neutrons+protons.
E. The atomic number is the number of
neutrons+protons.
What determines the types of chemical reactions
that an atom participates in?
A. its atomic mass
B. its atomic number
C. the number of e- in the innermost electron shell
D. the number of e- in the outermost electron shell
E. the number of protons it contains
D. the number of e- in the outermost electron shell
