Choose the Most Appropriate Description for Each Item

question 68

Multiple Choice

Choose the most appropriate description for each item.
-Ribosomes

• A)Contain enzymes for intracellular digestion
• B)Primary cellular organelles where proteins are assembled
• C)Package cellular secretions for export
• D)Extract energy stored in carbohydrates; synthesize ATP; produce water and carbon dioxide
• E)Synthesize subunits that will be assembled into two-part ribosomes in the cytoplasm
• F)Molecules that participate in protein synthesis
• G)Store substances
• H)Encode hereditary information
• I)Help distribute chromosomes to the new cells during cell division
• J)Convert light energy to chemical energy stored in the chemical bonds of glucose or starch

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Definitions:

Nitrogen Cycle

A biogeochemical cycle that describes the transformations of nitrogen and nitrogen-containing compounds in nature.

Nitrogen Fixation

The process by which nitrogen gas from the atmosphere is converted into ammonia by certain bacteria, making nitrogen available to living organisms.

Denitrification

A microbial process occurring mostly in soil and aquatic environments, where nitrate is reduced and ultimately produces molecular nitrogen, removing it from the ecosystem.

Hydrologic Cycle

The water cycle, which includes evaporation, precipitation, and flow to the ocean; supplies terrestrial organisms with a continual supply of fresh water.