WorksheetsMidterm Review (25)
Total questions: 32
Worksheet time: 21mins
What is the effect of an enzyme on the energy of a chemical reaction?
Enzymes increase the free energy of the products.
Enzymes decrease the free energy of the reactants.
Enzymes decrease the difference in energy between products and reactants.
Enzymes decrease the activation energy of the reaction.
What BEST describes the role of light in the overall process of photosynthesis?
Light provides the energy for breaking apart sugars into small molecules.
Light provides the energy for assembling small molecules into sugars
Light accepts the energy that is released by small molecules.
Light accepts the energy that is released by sugars
Choose the correct macromolecule to monomer
Iipid- sugar
Carbohydrate- amino acids
Lipid- fatty acids
nucleic acid- sugar
An example of a protein is:
sugar
enzyme
cell membrane
DNA
Which type of macromolecule has the function of storing and transmitting hereditary or genetic information
Carbohydrates
Lipids
Protein
Nucleic Acids
The process in which plants allow evaporation is called
condensation
transpiration
precipitation
runoff
The reactants of photosynthesis are:
Carbon dioxide & water
sugar & Oxygen
Oxygen and Nitrogen
Sugar & carbon dioxide
The cells of all organisms contain DNA. In cells of which of the following groups is the cellular DNA enclosed in a nucleus?
bacteria
eukaryotes
prokaryotes
viruses
e following structures are typically present in both plant and animal cells?
cell walls
centrioles
chloroplasts
mitochondria
After her run, Aisha felt thirsty. Thirst was her body’s way of telling her she needed more water to maintain _____.
growth
metabolism
development
homeostasis
Michael’s grandmother is taking part in an experiment to determine how well a new headache medication works. In this experiment, the people in Group A are taking the new medication. The people in Group B, including Michael’s grandmother, are taking a pill that does not contain the new medication.
In this experiment, what is Group B?
control group
experimental group
independent variable
dependent variable
Where animals live is called _________, their role in the environment is known as ______
habitat, niche
niche, habitat
symbiosis, habitat
tolerance, niche
A tapeworm feeding on a human in their intestines is known as which symbiotic relationship?
parastisim
mutualism
Commensalism
A variety of microorganisms live as symbionts in the human digestive tract. What determines whether their relationship with the human is parasitic or mutualistic?
whether their actions harm or benefit the human host
whether or not they gain energy from food that the human eats
their reproductive rate compared to the replication rate of human cells
their size compared to human cells
A population of seals live along the rocky shores of the northern coast of California. The seals hunt and eat fish that they catch in the water. As the population increases in size, which of these events becomes more likely to occur?
The seal population expands onto land, and the growth rate continues to increase.
A severe storm or a tidal wave acts to reduce the seal population by 25 percent.
Infectious diseases stop spreading through the population as the seals develop resistance to them.
Competition for food acts to slow the growth rate of the population.
What structure is found in ALL prokaryotes and eukaryotic cells
DNA in the nucleus
Cell wall
Cell membrane
ribosomes attached to the ER
Camille notices that the leaves of her pothos plant are drooping this morning. The leaves were not droopy yesterday. She decides the plant needs to be watered. What had Camille just done?
calculated the probability of the plant's ability to survive without water
devised a controlled experiment about the effect of water on plant leaves
formed a hypothesis based on quantitative data she has collected
made an inference based on past experience and observation
What property of a water molecule allows hydrogen bonds to form among adjacent molecules?
the strong covalent bonds that hold the oxygen atom to each hydrogen atom
the ionic bonds that form after the molecule separates into a hydroxide ion
(OH–) and hydrogen ion (H+).
the small size of the two hydrogen atoms compared to the oxygen atom.
the polarity of the molecule, which involves a slightly negative oxygen atom and slightly positive hydrogen atoms
The trout is a source of food for the human and the eagle. When there are more than one organism vying for the same source we call this____?
What do Plant cells have that Animal cells lack?
Cell wall and chloroplast
mitochondria and nucleus
cell membrane & cholorplast
Cell wall and small vacuoles
What is one way below that we can reduce the use of fossil fuels
Reduce trash generation by recycling more.
Install a more efficient showerhead and faucet to decrease her water usage.
Bike to school instead of driving
Am autotroph can:
Make its own food
Make its own water
Make its own oxygen
Make its own carbon
Using the food web what would happen if the eagle became extinct?
The frog population would decrease.
The frog population would increase.
The butterfly population would increase.
The snake population would decrease.
Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?
There would be a decrease in the small bird population.
There would be a decrease in the grass/flowers population.
There would be a decrease in the mice population.
There would be an increase in the grass/flowers population.
are very, very dry. During the day, it can get above 100 degrees Fahrenheit (F), but at night the temperature can drop into the 40s & 50s( F): have very little rainfall.
tangias
deserts
tundra
grasslands
are found near the equator. They have the largest variety of plant and animal life. They are very warm and very wet. Some of them can get as much as 400 inches of rain every year.
desert rain forest
tropical rain forest
arctic rain forest
temperate rain forests
are forests where the seasons change. The leaves change color in the autumn and fall off in the winter. Summers are warm and winters are cold.
redwood forest
temperate deciduous forest
seasonal forests
temperate devious forest
Biotic factors are ___________.
non-living parts of an ecosystem
living parts of an ecosystem
things that once were alive, but now are dead
not important parts of ecosystems.
Several different amino acids join together to form a protein. How do any two types of amino acids differ from one another?
the number of amino groups in the molecule
the number of carboxyl groups in the molecule
the chemical structure of the R group in the molecule
the number of chemical bonds formed by the central carbon atom
