ECORE BIOLOGY 1011K FINAL STUDY GUIDE
EXAM QUESTIONS WITH VERIFIED
SOLUTIONS GRADED A+
What level of protein structure is associated with the sequence of
amino acids? --CORRECT ANSWER--primary
Atoms that gain or lose electrons are known as: --CORRECT
ANSWER--ions
Which of the following macromolecules are made from amino acids?
--CORRECT ANSWER--proteins
What type of chemical bond stabilizes the 3 dimensional shapes of
nucleic acids and proteins: --CORRECT ANSWER--hydrogen bonds
Water molecules have one oxygen atom that is more electronegative
than the two hydrogen atoms bound to it. As a result, which type of
bonding holds water molecules together? --CORRECT ANSWER--
polar covalent bonding
Page 1 of 20
,A biologist isolates a large, unidentified molecule from some cells in
his lab. He determines that the macromolecule breaks into smaller
pieces with the concomitant loss of water. What reaction has he
observed? --CORRECT ANSWER--dehydration
A scientist observes that when she opens the back door of her house
to let her cat out, the songs of a certain species of bird abruptly
change. She wants to follow up on her observations with an informal
experiment. Which of the following is the best hypothesis for
explaining the birds' song changes? --CORRECT ANSWER--The
bird species switches from song to warning call whenever it sees a
potential predator.
A scientist wishes to test a new antibiotic's ability to treat stubborn
bacterial infections. He tests his hypothesis that the antibiotic works
better than existing treatments by giving bacterial infections to mice
and treating them with the antibiotic. He then determines how many
of the mice recover from their infections. What is missing from his
experimental design? --CORRECT ANSWER--He is missing a
control group of mice that did not receive the new antibiotic.
Page 2 of 20
, A scientist believes that she has found a new life form. Which of the
following conditions is not considered essential in determining
whether the putative new life form is alive? --CORRECT ANSWER--
The creature's body is bilaterally symmetrical.
What is the main purpose of conducting experiments? --CORRECT
ANSWER--disproving a hypothesis
Which of the following lists correctly presents levels of organization
from simplest to most complex? --CORRECT ANSWER--molecules,
cells, populations, ecosystems
A scientist discovers a putative new life form and notes that the
creature's body is bilaterally symmetrical and consequently satisfies
the criteria for defining life in which of the following categories? --
CORRECT ANSWER--None, symmetry is not a basic characteristic
of life
Why are theories stronger and more reliable than hypotheses? --
CORRECT ANSWER--because they are based on many
experimentally tested hypotheses
Page 3 of 20
EXAM QUESTIONS WITH VERIFIED
SOLUTIONS GRADED A+
What level of protein structure is associated with the sequence of
amino acids? --CORRECT ANSWER--primary
Atoms that gain or lose electrons are known as: --CORRECT
ANSWER--ions
Which of the following macromolecules are made from amino acids?
--CORRECT ANSWER--proteins
What type of chemical bond stabilizes the 3 dimensional shapes of
nucleic acids and proteins: --CORRECT ANSWER--hydrogen bonds
Water molecules have one oxygen atom that is more electronegative
than the two hydrogen atoms bound to it. As a result, which type of
bonding holds water molecules together? --CORRECT ANSWER--
polar covalent bonding
Page 1 of 20
,A biologist isolates a large, unidentified molecule from some cells in
his lab. He determines that the macromolecule breaks into smaller
pieces with the concomitant loss of water. What reaction has he
observed? --CORRECT ANSWER--dehydration
A scientist observes that when she opens the back door of her house
to let her cat out, the songs of a certain species of bird abruptly
change. She wants to follow up on her observations with an informal
experiment. Which of the following is the best hypothesis for
explaining the birds' song changes? --CORRECT ANSWER--The
bird species switches from song to warning call whenever it sees a
potential predator.
A scientist wishes to test a new antibiotic's ability to treat stubborn
bacterial infections. He tests his hypothesis that the antibiotic works
better than existing treatments by giving bacterial infections to mice
and treating them with the antibiotic. He then determines how many
of the mice recover from their infections. What is missing from his
experimental design? --CORRECT ANSWER--He is missing a
control group of mice that did not receive the new antibiotic.
Page 2 of 20
, A scientist believes that she has found a new life form. Which of the
following conditions is not considered essential in determining
whether the putative new life form is alive? --CORRECT ANSWER--
The creature's body is bilaterally symmetrical.
What is the main purpose of conducting experiments? --CORRECT
ANSWER--disproving a hypothesis
Which of the following lists correctly presents levels of organization
from simplest to most complex? --CORRECT ANSWER--molecules,
cells, populations, ecosystems
A scientist discovers a putative new life form and notes that the
creature's body is bilaterally symmetrical and consequently satisfies
the criteria for defining life in which of the following categories? --
CORRECT ANSWER--None, symmetry is not a basic characteristic
of life
Why are theories stronger and more reliable than hypotheses? --
CORRECT ANSWER--because they are based on many
experimentally tested hypotheses
Page 3 of 20
