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chpt 6 study
Question | Answer |
---|---|
what do enzymes lower? | they lower the energy it takes to start reaction ( ACTIVATION SITE) |
what is a substrate? | molecules being changed. |
what is the active site? | place on the enzyme where it attacks to the substrate. |
what is a nucleic acid? | DNA and RNA |
what do nucleic acids have? | they have long chains of nucleotides. |
what do nucleotides consist of ? | they consist of sugar, phosphate, nitrogen base. |
What is important to about DNA? | DNA is the instructions to make all of an organisms protein. |
what type of ions do acids release? | releases H+ ions. |
what type of ions do bases release? | releases OH- ions |
what is the main role of a buffer? | they are chemicals that some cells release that helps keep pH in specific range. |
what is the range buffers keep for most bodily fluids? | 6.5 to 7.5 for most bodily fluids. |
what is a property of water ? | its polar, stabilizes body temp. ,and fluid medium. |
what is polar? | good at dissolving substances. |
what is fluid medium? | allows molecules to flow. |
In an Ion if the e- and p+ are unequal what happens to the atom? | the atom will have an overall charge . |
what is an element? | substances that can't be seperated into simpler substances. |
what are important elements? | carbon, hydrogen, oxygen, nitrogen. |
what are saturated fats ? | single bonds only. |
what type of fats are they? | animal fats which means they are harder to break down. |
what are saturated fats ? | they are double bonds and are in plants. |
what are the functions in lipids? | they provide insulation,protective coating, energy storage,and the main component of cell membrane. they are also non-polar. |
what can you call the lipid backbone? | glycerol. |
what can you call lipid tails? | fatty acids. |
what happens if you want to build polymers? | you remove water which you do by when you link together two molecules which is called condensation. |
what happens if you want to break down polymers ? | you add water which breaks bonds between molecules which is called hydrolysis. |
what is starch? | long- term energy for plants and we use it for energy. |
what is glycogen? | long-term energy source for mammals and is stored in the liver. |
what is cellulose? | its a cell wall and structural support for plants. |
what are pigments in a protein? | they give your eyes,hair,skin and blood color. they also protect you from the sun. |
what are functions in a protein? | they have antibodies,tissue and muscle structure and hormones. |
what are proteins? | long chain of amino acids |
what do AA's cause? | the order of AA's cause the protein to fold in a specific shape. it also determines what it does. |