Bio100 Exam 1 Questions With Complete Solutions
A bond that forms when two atoms share electrons is called a
covalent bond. Correct Answers True
A lab is testing unknown solutions for the presence of lipids.
What would they use for their positive control?
a. a substance they know contains a lot of monosaccharides
b. a substance they known contains no monosaccharides
c. a substance they known contains a lot of fat
d. a substance they know contains no fat Correct Answers c. a
substance they known contains a lot of fat
An organism classified as a consumer captures energy directly
from the sun. Correct Answers False
Are large or small sample sizes more accurate for scientific
studies? Correct Answers Large sample sizes are more accurate
for scientific studies because it increase the chance of finding a
significant difference and leads to a more precise data.
Be able to figure out how much more or less H+ is in a solution
of a certain pH compared to a different solution. Correct
Answers Ex: How much less hydrogen is in a solution of
pH 4 compared to pH 1? 1000x
Ex: How much less hydrogen is in a solution of
pH 8 compared to pH 7? 10x
Ex: How much less hydrogen is in a solution of
,pH 9 compared to pH 12? .0001x
Be able to list, in order, the taxonomic hierarchy. Which
taxonomic category is the most specific and which is the most
general? Correct Answers
Domain>Kingdom>Phylum>Class>Order>Family>Genus>Spec
ies
-Domains are most general and species are specific.
Can a cell communicate with other cells or monitor signals from
outside the cell? Correct Answers Yes. The steps to cell
communication are signal, reception, transduction, and response.
Chemical reactions can rearrange atoms but never create or
destroy them. Correct Answers True
Describe one difference between a scientific theory and a
hypothesis. Correct Answers A theory is more fully developed
and tested than a hypothesis.
Describe one way in which water helps with homeostasis.
Correct Answers Water helps homeostasis by making a good
insulator, resisting temperature changes.
Ex: Water helps because when your body temperature gets to
hot, your body releases water as sweat, to cool down your body.
Generally, what does an evolutionary tree tell you about the
organisms on it? Correct Answers How organisms are related.
, How are fluids/particles transported out of the cell by exocytosis
or into the cell by endocytosis? Correct Answers Exocytosis:
1. Vesicle from Golgi with products to be exported.
2. Fusion from vesicle with plasma membrane.
3. Expulsion of contents into extracellular environment.
Endocytosis:
1. A small portion of the cell membrane buds inward, entrapping
particles.
2. A vesicle forms, which brings particles into the cell.
3. Vesicle surrounds the imported particles.
How do simple and facilitated diffusion differ? Correct Answers
-Simple diffusion is the movement of molecules from high to
low concentration using no energy.
-Facilitated diffusion is the movement of molecules act as ''
permeable'' facilitators at their membrane
How does taxonomy help scientists study life? Correct Answers
By providing easily remembered scientific names for organisms.
The more features 2 organisms share, the more taxonomic levels
they share. Ranks group to similar organisms.
How is active transport different from passive transport? In
which direction along the concentration gradient are substances
"actively" transported? Describe an example. Correct Answers -
Active Transport: Active Transport uses ATP to pump
molecules AGAINST/UP the concentration gradient. Transport
occurs from a low concentration of solute to high concentration
of solute. Requires cellular energy.
A bond that forms when two atoms share electrons is called a
covalent bond. Correct Answers True
A lab is testing unknown solutions for the presence of lipids.
What would they use for their positive control?
a. a substance they know contains a lot of monosaccharides
b. a substance they known contains no monosaccharides
c. a substance they known contains a lot of fat
d. a substance they know contains no fat Correct Answers c. a
substance they known contains a lot of fat
An organism classified as a consumer captures energy directly
from the sun. Correct Answers False
Are large or small sample sizes more accurate for scientific
studies? Correct Answers Large sample sizes are more accurate
for scientific studies because it increase the chance of finding a
significant difference and leads to a more precise data.
Be able to figure out how much more or less H+ is in a solution
of a certain pH compared to a different solution. Correct
Answers Ex: How much less hydrogen is in a solution of
pH 4 compared to pH 1? 1000x
Ex: How much less hydrogen is in a solution of
pH 8 compared to pH 7? 10x
Ex: How much less hydrogen is in a solution of
,pH 9 compared to pH 12? .0001x
Be able to list, in order, the taxonomic hierarchy. Which
taxonomic category is the most specific and which is the most
general? Correct Answers
Domain>Kingdom>Phylum>Class>Order>Family>Genus>Spec
ies
-Domains are most general and species are specific.
Can a cell communicate with other cells or monitor signals from
outside the cell? Correct Answers Yes. The steps to cell
communication are signal, reception, transduction, and response.
Chemical reactions can rearrange atoms but never create or
destroy them. Correct Answers True
Describe one difference between a scientific theory and a
hypothesis. Correct Answers A theory is more fully developed
and tested than a hypothesis.
Describe one way in which water helps with homeostasis.
Correct Answers Water helps homeostasis by making a good
insulator, resisting temperature changes.
Ex: Water helps because when your body temperature gets to
hot, your body releases water as sweat, to cool down your body.
Generally, what does an evolutionary tree tell you about the
organisms on it? Correct Answers How organisms are related.
, How are fluids/particles transported out of the cell by exocytosis
or into the cell by endocytosis? Correct Answers Exocytosis:
1. Vesicle from Golgi with products to be exported.
2. Fusion from vesicle with plasma membrane.
3. Expulsion of contents into extracellular environment.
Endocytosis:
1. A small portion of the cell membrane buds inward, entrapping
particles.
2. A vesicle forms, which brings particles into the cell.
3. Vesicle surrounds the imported particles.
How do simple and facilitated diffusion differ? Correct Answers
-Simple diffusion is the movement of molecules from high to
low concentration using no energy.
-Facilitated diffusion is the movement of molecules act as ''
permeable'' facilitators at their membrane
How does taxonomy help scientists study life? Correct Answers
By providing easily remembered scientific names for organisms.
The more features 2 organisms share, the more taxonomic levels
they share. Ranks group to similar organisms.
How is active transport different from passive transport? In
which direction along the concentration gradient are substances
"actively" transported? Describe an example. Correct Answers -
Active Transport: Active Transport uses ATP to pump
molecules AGAINST/UP the concentration gradient. Transport
occurs from a low concentration of solute to high concentration
of solute. Requires cellular energy.
