Check 6 Style

Which elements make up over 90% of living things

• a. Carbon, oxygen, sulfur, hydrogen
• b. hydrogen, carbon, oxygen, nitrogen
• c. phosphorous, oxygen, sulfur, hydrogen
• d. sulfur, oxygen, carbon, phosphorous

How is water able to carry nutrients into the cell and waste out of the cell?

• a. Because it cannot be broken down into smaller parts
• b. Because is cannot help with biochemical processess
• c. Because it is polar and can dissolve many substances
• d. Because it is acid and reacts with bases in the cell

What property of water helps it to regulate temperature?

• a. cohesion
• b. heat capacity
• c. density
• d. surface tension

How is protein from food used to build proteins in cells.

• d. Proteins are broken down to amino acids, the DNA builds human proteins in cells
• a. Proteins in food is refolded and then cells can use it.
• b. Proteins from food are used directly by the cellos
• c. Proteins are digested and changed to human amino acids to build proteins in cells
• Option 5

Our bodies use plant sugars to make glycogen. What atoms are present in glycogen?

• a. Hydrogen, carbon, nitrogen
• b. Carbon, hydrogen,oxcygen
• c. oxygen, sulfur, carbon
• d. nitrogen, carbon, sulfur

Contrast the structure of proteins and nucleic acids

• a. Nitrogen bases form the backbone of nucleic acids. Peptides form the backbone of proteins
• b. Nucleotides link to make nucleic acids. Amino acids link together to form proteins
• c. Nucleic acid has altering base pairs. Proteins have alternating peptides.
• d. Nucleic acids are held together by sugars and phosphate. Proteins are held together by carbon-carbon bonds

How do carbohydrates and lipids function similarly in organisms?

• a. Both are copied during meiosis
• b. Both dissolve nutrients in the digestive system
• c. Both are sources of energy
• d. Both lower the activation energy of reactions

Amylase is an enzyme that breaks down starch in the mouth. What is the role of amylase in metabolic reactions?

• a. Reduce the energy lost as heat
• b. To control the direction of the reaction
• c. To speed up the rate of the reaction
• d. To protect the reaction from chimicals

Long chains of amino acids bonded together make enzymes. What type of macromolecule is an enzyme?

• a. Carbohydrate
• b. Lipids
• c. Proteins
• d. Nucleic Acid

Which structure maintains homeostasis by regulating what moves in and out of the cell?

• a. Cell wall
• b. cell membrane
• c. mitochondrion
• d. vacuole