8-1
Which of the following are autotrophs?
a. Impalas
b. Plants
c. Leopards
d. Mushrooms
b. Plants
Which scientist concluded that most of a growing plant's mass comes from water?
a. Priestley
b. Van Helmont
c. Ingenhousz
d. Calvin
b. Van Helmont
The products of photosynthesis are
a. Sugars and Oxygen.
b. Sugars and Carbon Dioxide.
c. Water and Carbon Dioxide.
d. Hydrogen and Oxygen.
a. Sugars and Oxygen.
One of the principal chemical compounds that living things use to store energy is
a. DNA
b. ATP
c. H20
d. CO2
b. ATP
In addition to light and chlorophyll, photosynthesis requires
a. Water and Oxygen.
b. Water and Sugars.
c. Oxygen and Carbon Dioxide
d. Water and Carbon Dioxide
d. Water and Carbon Dioxide
The first process in the light-dependent reactions of photosynthesis is
a. Light Absorption.
b. Electron Transport.
c. Oxygen Production.
d. ATP Formation.
a. Light Absorption.
How do heterotrophs and autotrophs differ in the way they obtain energy?
Autotrophs are able to obtain energy by making their own food. Heterotrophs obtain their energy by consuming food.
The leaves of a plant appear green because chlorophyll
a. Reflects Blue Light.
b. Absorbs Blue Light.
c. Reflects Green Light.
d. Absorbs Green Light.
c. Reflects Green Light.
Which substance from the light-dependent reactions of photosynthesis is a source of energy for the Calvin Cycle?
a. ADP
b. NADPH
c. H2O
d. Pyruvic Acid
b. NADPH
Describe the three parts of an ATP molecule.
Adenine (Nitrogen), Ribose (Sugar), and Three Phosphate Groups
How were Priestley's and Ingenhousz's discoveries about photosynthesis related?
Priestley discovered that plants produced a substance needed to burn candles, now known to be oxygen. Ingenhousz found that plants produce oxygen only when exposed to light.
Summarize what happens in the Calvin Cycle.
Plants use the energy that ATP and NADPH contain to build high-energy compounds that can be stored for a long time. The Calvin Cyle uses six molecules of carbon dioxide to produce a single 6-carbon sugar molecule.
Compare the amounts of energy stored by ATP and glucose. Which compound is used by the cell as an immediate source of energy?
A single molecule of glucose stores more than 90 times the energy stored by ATP, but ATP which transfers energy quickly is used by the cell as an immediate source of energy.
What role do plant pigments play in the process of photosynthesis?
Plant Pigments absorb energy from light and transfer it to electrons involved in photosynthesis.
Describe three factors that affect the rate at which photosynthesis occurs.
Temperature, the amount of available water, and the intensity of the Light