BIOLOGY 1010 WEEK 1 EXAM 2025
QUESTIONS AND ANSWERS
The complete genetic makeup of an organism is called its - ANS genome
Imagine that a scientist was able to take pictures of atoms and the position of their electrons. In
one molecule, he found that the shared electron was around one atom 50% of the time and
around the second atom 50% of the time. From this he concluded that these atoms shared
what type of bond? - ANS nonpolar covalent
Which of these is not a testable hypothesis? - ANS dogs are happier when they are walked
regularly
The chlorine atom has 17 electrons and the sodium atom has 11 electrons. These two atoms
combine to form NaCl. After NaCl is ionized in water, how many electrons are in the chlorine
ion? - ANS 18
If you could measure the charge coming from various parts of an atom, what charge would the
nucleus have? - ANS positive
An atom with 7 electrons in its outer shell will most likely bond with - ANS An atom with 1
electron in its outer shell.
A researcher is examining swimming speed in goldfish. She uses a small net to individually catch
20 goldfish from a large tank of 100 and has them swim along a narrow raceway one at a time.
She measures the swimming speed of each fish to determine the average swimming speed of a
goldfish. All fish are held at the same temperature, were fed the same food, swim the same
distance and were the same age and gender. What is wrong with her experiment? - ANS She
did not use a random sample
1 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
, A researcher was interested in the impact of exercise on tumor growth in mice. She took 50
mice with tumors and had them walk each day on the treadmill for 6 weeks. All of the mice
were fed the same diet, held under the same environmental conditions and required to walk
the same amount on the treadmill. At the end of the experiment, she measured the size of their
tumors. What is the biggest flaw in her experimental design? - ANS She lacks a control group
The beaches at a nearby lake have been closed because of high E. coli counts. The lake is
surrounded by agricultural areas and summer cottages. We know that different species of
vertebrates have different E. coli strains in their digestive tracts. Which of the following
represents a hypothesis for the source of the high E. coli counts? - ANS Runoff from dairy
farms causes high E. coli counts
In science, a theory should - ANS -be viewed as knowledge
-be supported by a substantial body of evidence
-provide the ability to make many correct predictions
Macromolecules are polymers composed of monomers. For example polysaccharides like ___
are made of the repeating monomer ___. - ANS cellulose; glucose
You are a medical examiner and are examining the brain tissue of someone who died at the age
of 58. You find a large number of neurofibrillary tangles associated with hyperphosphorylated
tau but no modified â-APP. From this you conclude that this individual - ANS Was likely a
boxer and died due to Chronic Traumatic Encephalopathy
A researcher is working with a molecule with the chemical formula C4H8. He notices that it
does not always act the same in chemical reactions or within the cells he is testing. This
difference in function is most likely because - ANS He has two different isomers of the
molecule
Sucrose is composed of one monomer of glucose and one monomer fructose. This means it is a
- ANS disaccharide
2 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
QUESTIONS AND ANSWERS
The complete genetic makeup of an organism is called its - ANS genome
Imagine that a scientist was able to take pictures of atoms and the position of their electrons. In
one molecule, he found that the shared electron was around one atom 50% of the time and
around the second atom 50% of the time. From this he concluded that these atoms shared
what type of bond? - ANS nonpolar covalent
Which of these is not a testable hypothesis? - ANS dogs are happier when they are walked
regularly
The chlorine atom has 17 electrons and the sodium atom has 11 electrons. These two atoms
combine to form NaCl. After NaCl is ionized in water, how many electrons are in the chlorine
ion? - ANS 18
If you could measure the charge coming from various parts of an atom, what charge would the
nucleus have? - ANS positive
An atom with 7 electrons in its outer shell will most likely bond with - ANS An atom with 1
electron in its outer shell.
A researcher is examining swimming speed in goldfish. She uses a small net to individually catch
20 goldfish from a large tank of 100 and has them swim along a narrow raceway one at a time.
She measures the swimming speed of each fish to determine the average swimming speed of a
goldfish. All fish are held at the same temperature, were fed the same food, swim the same
distance and were the same age and gender. What is wrong with her experiment? - ANS She
did not use a random sample
1 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
, A researcher was interested in the impact of exercise on tumor growth in mice. She took 50
mice with tumors and had them walk each day on the treadmill for 6 weeks. All of the mice
were fed the same diet, held under the same environmental conditions and required to walk
the same amount on the treadmill. At the end of the experiment, she measured the size of their
tumors. What is the biggest flaw in her experimental design? - ANS She lacks a control group
The beaches at a nearby lake have been closed because of high E. coli counts. The lake is
surrounded by agricultural areas and summer cottages. We know that different species of
vertebrates have different E. coli strains in their digestive tracts. Which of the following
represents a hypothesis for the source of the high E. coli counts? - ANS Runoff from dairy
farms causes high E. coli counts
In science, a theory should - ANS -be viewed as knowledge
-be supported by a substantial body of evidence
-provide the ability to make many correct predictions
Macromolecules are polymers composed of monomers. For example polysaccharides like ___
are made of the repeating monomer ___. - ANS cellulose; glucose
You are a medical examiner and are examining the brain tissue of someone who died at the age
of 58. You find a large number of neurofibrillary tangles associated with hyperphosphorylated
tau but no modified â-APP. From this you conclude that this individual - ANS Was likely a
boxer and died due to Chronic Traumatic Encephalopathy
A researcher is working with a molecule with the chemical formula C4H8. He notices that it
does not always act the same in chemical reactions or within the cells he is testing. This
difference in function is most likely because - ANS He has two different isomers of the
molecule
Sucrose is composed of one monomer of glucose and one monomer fructose. This means it is a
- ANS disaccharide
2 Copyright ©2025 BRAINBARTER ALL RIGHTS RESERVED
