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Biology 20- Digestive system Exam Questions and Answers
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Biology 20- Digestive system Exam Questions and Answers
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Biology 20- Digestive system ExamQuestions and Answers
What are the four macromolecules? - Answers -Proteins, lipids, carbohydrates and
nucleic acids
these are too large to be absorbed so the body needs a way of breaking them down and
re-building them
What is a carbohydrates bulding blocks? and how are they absorbed? - Answers -
*monosacchride*
Active transport into bloodstream
What are the building blocks for Proteins? and how are they absorbed? - Answers -
*amino acids*
Active transport into bloodstream
Building blocks for lipids? and how are they absorbed? - Answers -*glycerol and fatty
acids*
Passive transport into lymphatic system
Building blocks for nucleic acid? and how are they absorbed? - Answers -*nucleotides*
active transport into bloodstream
what is a nucleotide composed of? - Answers -five carbon sugars, phosphate molecule
and nitrogen base
Protein amino acids composed of? - Answers -Nitrogen/NH2, amino group and COOH
acid
Proteins ARE soluble in water
carbohydrate monosacchrides compose of? - Answers -3 to 7 carbon atoms
corresponding number of hydrogen and oxygen atoms
*carbs always contain carbon hydrogen and oxygen*
What is homeostasis? - Answers -A process by which a constant internal environment is
maintained despite changes in the external environment
What is dehydration synthesis? *build* - Answers -OH removed from one molecule, H
removed from another, "empty spaces" join together
H+OH=H2O
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