Photosynthesis & Cellular Respiration
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Together, respiration and photosynthesis keep the levels of carbon dioxide & oxygen in the atmosphere ______ .
a. constantly changing
b. constantly increasing
c. fairly constant
d. constantly decreasing
How are photosynthesis and respiration related?
a. They both produce oxygen
b. They have the same equation
c. They have opposite equations
d. They both produce carbon dioxide
They have opposite equations.
The stage of respiration that releases most of the energy in glucose occurs in the ___
What happens during respiration?
a. oxygen is released into the air
b. glucose is broken down, releasing energy
c. water and carbon dioxide are converted into energy
d. carbohydrates are released into the bloodstream
Glucose is broken down, releasing energy.
How does photosynthesis benefit heterotrophs?
a. it creates clean water
b. it adds carbon dioxide to the air
c. it creates food that they can eat
d. it eliminates harmful sugars
It creates food that they can eat.
What happens during photosythesis?
a. The cell uses oxygen to make food
b. the cell uses glucose to make oxygen
c. the cell uses the energy in sunlight to make food
d. the cell uses the energy in sunglight to make carbon dioxide
The cell uses the energy in sunlight to make food.
What are the products of photosynthesis?
a. carbon dioxide & water
b. oxygen & water
c. oxygen & sugars
d. carbon dioxide and sugars
oxygen & sugars
Carbon dioxide enter the plant through ___
What captures energy from sunlight during photosynthesis?
a. solar cells
d. chlorophyll & other pigments
chlorophyll & other pigments
What is chemotherapy?
a. use of drugs to treat disease
b. use of surgery to treat disease
c. use of radiation to treat disease
d. use of drugs to prevent cancer
use of drugs to treat disease
Scientists think cancer begins when____
a. cells stop growing
b. DNA replication stops
c. a cell divides too slowly
d. a mutation occurs in DNA
a mutation occurs in DNA
Cancer is a disease in which cells ____
a. grow and divide uncontrollably
b. die before they can mature
c. stop producing DNA
d. die during mitosis
grow and divide uncontrollably
Mitosis is the stage of the cell cycle during which the ___
a. cell's nucleus divides into 2 new nuclei
b. cell's DNA is replicated
c. cell divides into 2 new cells
d. cell's cytoplasm divides
the cell's nucleus divides into 2 new nuclei
Under which of the following conditions is lactic-acid fermentation most likely to occur?
a. playing video games
c. a very fast run
d. a long walk
a very fast run
The energy-releasing process that does not require oxygen is called ____
Cells in many-celled organisms ____
a. all look the same
b. are often quite different from each other
c. all have the same structure
d. are the same size in every part of the organism
are often quite different from each other
Specialized cells are found only in ___
a. many-celled organisms
c. single-celled organisms
All organic compounds contain the element ______
Small opening called ____ allow carbon dioxide to enter a leaf.
Energy from glucose is released in the process of ______
The products of respiration are energy, carbon dioxide, and ________
When a mutation disturbs the cell cycle, the result can be _______, or uncontrolled cell division.
Chloroplasts contain a pigment called _____ that captures the energy in light.
A(n) _______ is a group of similar cells that work togehter to perform a specific function.
A heterotroph is an organism that cannot _______
c. make its own food
make its own food
ESSAY QUESTION: Explain the following statement: Photosythesis and respiration are opposite processes.
ESSAY QUESTION: Animals do not make their own food from energy in sunlight. Explain why they still depend on the sun for energy.
ESSAY QUESTION: Contrast mitochondria and chloroplasts.
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