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biochemistry test

NHS 2014-2015 biochemistry test

QuestionAnswer
What is the most important thing DNA does for us? It provides the instructions for making proteins in an organism.
How does our body use glucose? The carbohydrates in glucose are broken down to release chemical energy that is used by our body cells.
What does hydrophobic mean? a substance is INSOLUBLE IN WATER.
What is an example of a hydrophobic molecule? Lipids
What characteristic of an enzyme suggests that the shape of an enzyme determines its function? Enzymes are specific to a substrate.
What is the relationship between proteins and nucleic acids? The nucleic acids actually contain the information needed to make proteins.
What does our body need to synthesize proteins? We need a diet rich in amino acids.
How does enzymes affect the reactions in which they take part? Enzymes decrease the activation energy of the reaction.
If a substance causes an oily spot to appear on paper, what does the substance have in it? LIPIDS
What does a DNA molecule look like? a twisted ladder
How is the function of DNA different from a LIPID? DNA contains genetic material. Lipids make up cell membranes.
Which kind of molecule is used for long-term storage of energy? Lipids
Give an example of a monomer. monosaccharide
What kind of charge does an electron have? negative
What kind of ion forms when a neutral atom GAINS an additional electron? NEGATIVE
If you want to find which element is the heaviest, what do you look at? Look at the mass number.
What does a chemical reaction do? It changes one set of chemicals into another set of chemicals.
What organic molecules help to fight diseases? proteins
polysaccharides are which type of organic molecule? carbohydrates
What organic molecule is composed of nucleotides? nucleic acids
Name an important part of a cell membrane. lipids
Created by: IAMGCS