Unit 2 - Proteins Flashcards

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1
Q

What are the monomeric units of proteins?

A

Amino acids

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2
Q

Outline the journey an amino acid takes from food to protein in a cell

A
  • food is ingested
  • enzymes in the stomach/small intestine hydrolyse protein into amino acids
  • the amino acids are absorbed by the gut wall into the blood
  • the amino acids leave the blood in the tissue fluid and enter cells
  • proteins are synthesised on the ribosomes
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3
Q

Give 4 functions of proteins

A
  • enzymes
  • hormones
  • antibodies
  • structural proteins
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4
Q

What is a chain of amino acids called?

A

A polypeptide

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5
Q

What is the function of haemoglobin?

A

Carries oxygen in the blood in erythrocytes

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6
Q

How many oxygen atoms can one haemoglobin molecule carry?

A

8 - remember ATOMS not MOLECULES

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7
Q

What is the function of catalase?

A

Break down of hydrogen peroxide which otherwise is harmful to cells

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