biol

The amount of energy needed for a reaction to occur is called the _________?

Which of the following are the features of plants?

• move around

• can make own food

• have cell walls

• have chlorophyll

Photosynthesis goal is to

• make sugar

• make water

• make O2 gas

• make carbon dioxide

Most chemical reactions in the body rely on enzymes. Why are enzymes are necessary for many cellular reactions?

• The reactions are too slow to meet the needs of the cell if enzymes are missing

• The reactions take up too much space in the cell if enzymes are missing

• Enzymes change reactants from solid to liquid during the reactions.

• Enzymes supply the oxygen necessary for the reactions.

Where does ingestion begin?

• duodenum

• stomach

• mouth

• colon

The mRNA sequence GUG and GAG represent which amino acids?

• Valine & Glutamic Acid
• Valine & Glycine
• Alanine & Glycine
• Alanine & Glutamic Acid

The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements?

• The body is kept relatively warm to prevent too much enzyme action.

• The body needs to be warm to prevent hypothermia.

• Enzymes function best at a specific temperature.

• There is no connection between the two statements.

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .
  

The more CO2 in the air, the faster photosynthesis can occur

• True

• False

Operons are found in the cells of which of the following types of organisms?

• prokaryotes (bacteria)
• eukaryotes (plant and animals)
• animals only
• viruses