1.1 The study of life Read Online
Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.
Question: Which part of photosynthesis is MOST closely associated with reaction in which carbon dioxide in the air is stored in a molecule of glucose?
Choices:
Light Reaction only
Calvin Cycle only
This occurs in both the Light Reaction and the Calvin Cycle
This docent occur in either reaction
Question: The energy used in the Calvin cycle for the production of carbohydrate molecules comes from
Choices:
ATP made during cellular respiration
The Krebs Cycle
ATP made in the light reactions of photosynthesis
CO2 absorbed during the last stage of photosynthesis
Question: Because it is so necessary in photosynthesis, one can say that the ultimate ORIGINAL source of energy for all living things on Earth is
Choices:
Glucose
The Sun
Water
Carbon Dioxide
Question: Where does the first part of the light reaction take place?
Choices:
in the Stroma
Outside the Chloroplasts
in the Thylakoid Membranes
Only in Chlorophyll Molecules
Question: The role of chlorophyll in photosynthesis is to
Choices:
Absorb Light Energy
Do nothing; chlorophyll is unimportant in photosynthesis
Split water molecules
All of the above
Question: Plants gather the sun's energy with specific light-absorbing molecules called
Choices:
Pigments
Thylakoids
Glucose
Grana
Question: Products of the light reactions of photosynthesis that provide energy for the Calvin cycle are
Choices:
Oxygen and ATP
Water and Oxygen
ATP and NADPH
Oxygen and NADPH
Question: Which region of the visible spectrum is not absorbed well by chlorophyll?
Choices:
Blue
Violet
Green
Red
Question: Plants take in energy by absorbing
Choices:
Sugars
Chlorophyll A
Heat
Light Energy
Question: Heterotrophs are organisms that can
Choices:
Produce food from inorganic molecules and sunlight
Survive without energy
Consume other organisms for energy
Carry out either photosynthesis or chemosyntheiss
Question: What is a product of the Calvin cycle?
Choices:
Oxygen Gax
ATP
Sugar
Carbon Dioxide Gas