ch 6 crucial components

Question 1

proteins

large complex molecules found in the cells of all

Answer 1

living things

Question 2

proteins

critical components of all the

Answer 2

tissues of the human body

Question 3

proteins

function in

Answer 3

• metabolism
• immunity
• fluid balance
• nutrient transport
  *

Question 4

proteins

in certain circumstances provide

Answer 4

energy

Question 5

proteins

contain a special form of

Answer 5

nitrogen our bodies can readily use

Question 6

amino acids

Answer 6

are the nitrogen containing molecules that combine to form proteins

Question 7

essential amino acids

Answer 7

• cannot be produced by our bodies
• must be obtained from food
• 9 of 20 amino acids in our bodies are essential

Question 8

nonessential amino acids

Answer 8

can be made by our bodies

Question 9

how are proteins made

Answer 9

• when 2 amino acids join together in a peptide bond, they form a dipeptide
• 10 or more amino acids bonded together form a polypeptide
• proteins are made by combining multiple amino acids

Question 10

how are proteins made?

transcription

Answer 10

use of the genetic info in DNA to make RNA
* mRNA copies the genetic info and carries it to the ribsome

Question 11

how are proteins made?

translation

Answer 11

conversion of genetic info in RNA to assemble amino acids in the proper sequence to synthesize a protein on the ribosome

Question 12

protein organization determines functions

protein strcuture has 4 levels

Answer 12

• primary strucuture
• secondary structure
• tertiary and quaternary structure