BIOL 1010 Midterm Exam Practice Test Questions
- Brooklyn College 100% Solved
If your hypothesis is "Hair that is shaved grows back coarser and darker," what
is your null hypothesis?
a. There is no difference in the color of hair that is shaved relative to hair that is
not shaved.
b. There is no difference in the coarseness of hair that is shaved relative to hair
that is not shaved.
c. Hair that is taken off with a cream depilatory grows back coarser and darker.
d. Hair that is shaved grows back finer and lighter.
e. There is no difference in the coarseness or color of hair that is shaved relative
to hair that is not shaved. - ANSWER e. There is no difference in the coarseness
or color of hair that is shaved relative to hair that is not shaved.
Before experimental drugs can be brought to market, they must undergo many
rigorous trials to ensure that they deliver their medical benefits effectively and
safely. One method commonly used in this process is to compare the effect of a
drug with that of a placebo in double-blind tests. Which of the following correctly
describes a double-blind test?
a. The researchers apply two-layered blindfolds to the study participants so that
they cannot see whether they are receiving the drug or a placebo.
b. Neither the researchers nor the study participants know who is receiving the
drug and who is receiving the placebo.
c. The researchers know who is receiving the drug and who is receiving the
placebo, but they do not know what the supposed effects of the drug should be.
d. The researchers do not know who receives the drug or the placebo, but the
participants know and tell them later.
e. None of the above is correct. - ANSWER b. Neither the researchers nor the
study participants know who is receiving the drug and who is receiving the
placebo.
,Scientific theories do not represent speculations or guesses about the natural
world. Instead, they are hypotheses—proposed explanations for natural
phenomena—that have been...
a. so strongly and persuasively supported by empirical observation that the
scientific community views them as unlikely to be altered by new evidence.
b. verified by at least one critical experiment.
c. validated by the International Board of Scientific Theories.
d. used to support the political stances of the scientists who have developed
them.
e. found to be statistically significant. - ANSWER a. so strongly and persuasively
supported by empirical observation that the scientific community views them as
unlikely to be altered by new evidence.
In controlled experiments,
a. all variables are held constant.
b. one variable is manipulated, while others are held constant.
c. all critical variables are manipulated.
d. all variables are dependent on each other.
e. all variables are independent of each other. - ANSWER b. one variable is
manipulated, while others are held constant.
An experimental condition applied to research subjects is called a
a. treatment.
b. control.
c. randomization.
d. placebo.
e. variable. - ANSWER a. treatment.
A covalent bond is formed when:
a. two nonpolar molecules associate with each other in a polar environment.
b. a positively charged particle is attracted to a negatively charged particle.
c. one atom gives up electrons to another atom.
, d. two atoms share electrons.
e. two polar molecules associate with each other in a nonpolar environment. -
ANSWER d. two atoms share electrons.
Which of the following statements about enzymes is INCORRECT?
a. Enzymes speed up chemical reactions.
b. Enzymes contain an active site for binding of particular substrates.
c. Enzymes undergo a permanent change during the reactions they promote.
d. Enzymes often induce conformational changes in the substrates that they
bind.
e. Enzymes can initiate chemical reactions. - ANSWER c. Enzymes undergo a
permanent change during the reactions they promote.
A peptide bond is a ________ bond between two ________.
a. covalent; nucleotides
b. covalent; amino acids
c. ionic; monosaccharides
d. hydrogen; fatty acids
e. ionic; fatty acids - ANSWER b. covalent; amino acids
In a nucleic acid, adjacent nucleotides are bound to each other in what way?
a. base to phosphate group
b. phosphate group to sugar
c. phosphate group to phosphate group
d. sugar to sugar
e. base to base - ANSWER b. phosphate group to sugar
Three principal types of bonds hold multiple atoms together. These are
a. phosphate bonds, disulfide bonds, and hydrogen bonds.
b. hydrogen bonds, ionic bonds, and glycosidic linkages.
- Brooklyn College 100% Solved
If your hypothesis is "Hair that is shaved grows back coarser and darker," what
is your null hypothesis?
a. There is no difference in the color of hair that is shaved relative to hair that is
not shaved.
b. There is no difference in the coarseness of hair that is shaved relative to hair
that is not shaved.
c. Hair that is taken off with a cream depilatory grows back coarser and darker.
d. Hair that is shaved grows back finer and lighter.
e. There is no difference in the coarseness or color of hair that is shaved relative
to hair that is not shaved. - ANSWER e. There is no difference in the coarseness
or color of hair that is shaved relative to hair that is not shaved.
Before experimental drugs can be brought to market, they must undergo many
rigorous trials to ensure that they deliver their medical benefits effectively and
safely. One method commonly used in this process is to compare the effect of a
drug with that of a placebo in double-blind tests. Which of the following correctly
describes a double-blind test?
a. The researchers apply two-layered blindfolds to the study participants so that
they cannot see whether they are receiving the drug or a placebo.
b. Neither the researchers nor the study participants know who is receiving the
drug and who is receiving the placebo.
c. The researchers know who is receiving the drug and who is receiving the
placebo, but they do not know what the supposed effects of the drug should be.
d. The researchers do not know who receives the drug or the placebo, but the
participants know and tell them later.
e. None of the above is correct. - ANSWER b. Neither the researchers nor the
study participants know who is receiving the drug and who is receiving the
placebo.
,Scientific theories do not represent speculations or guesses about the natural
world. Instead, they are hypotheses—proposed explanations for natural
phenomena—that have been...
a. so strongly and persuasively supported by empirical observation that the
scientific community views them as unlikely to be altered by new evidence.
b. verified by at least one critical experiment.
c. validated by the International Board of Scientific Theories.
d. used to support the political stances of the scientists who have developed
them.
e. found to be statistically significant. - ANSWER a. so strongly and persuasively
supported by empirical observation that the scientific community views them as
unlikely to be altered by new evidence.
In controlled experiments,
a. all variables are held constant.
b. one variable is manipulated, while others are held constant.
c. all critical variables are manipulated.
d. all variables are dependent on each other.
e. all variables are independent of each other. - ANSWER b. one variable is
manipulated, while others are held constant.
An experimental condition applied to research subjects is called a
a. treatment.
b. control.
c. randomization.
d. placebo.
e. variable. - ANSWER a. treatment.
A covalent bond is formed when:
a. two nonpolar molecules associate with each other in a polar environment.
b. a positively charged particle is attracted to a negatively charged particle.
c. one atom gives up electrons to another atom.
, d. two atoms share electrons.
e. two polar molecules associate with each other in a nonpolar environment. -
ANSWER d. two atoms share electrons.
Which of the following statements about enzymes is INCORRECT?
a. Enzymes speed up chemical reactions.
b. Enzymes contain an active site for binding of particular substrates.
c. Enzymes undergo a permanent change during the reactions they promote.
d. Enzymes often induce conformational changes in the substrates that they
bind.
e. Enzymes can initiate chemical reactions. - ANSWER c. Enzymes undergo a
permanent change during the reactions they promote.
A peptide bond is a ________ bond between two ________.
a. covalent; nucleotides
b. covalent; amino acids
c. ionic; monosaccharides
d. hydrogen; fatty acids
e. ionic; fatty acids - ANSWER b. covalent; amino acids
In a nucleic acid, adjacent nucleotides are bound to each other in what way?
a. base to phosphate group
b. phosphate group to sugar
c. phosphate group to phosphate group
d. sugar to sugar
e. base to base - ANSWER b. phosphate group to sugar
Three principal types of bonds hold multiple atoms together. These are
a. phosphate bonds, disulfide bonds, and hydrogen bonds.
b. hydrogen bonds, ionic bonds, and glycosidic linkages.
