How would the function of this enzyme be affected if a mutation lead to a negatively charged amino acid being in that location?
a negatively charged amino acid (R group) would likely prevent the enzyme from functioning, The positive charge would probably disrupt the shape of the enzymes active site, preventing binding of the substrate.
Why would you expect the energy present in the bonds of glucose to be more readily available than the energy from the sugar lactose quizlet?
Why would you expect the energy present in the bonds of glucose to be more readily available than the energy from the sugar lactose? Glucose is a simple sugar, and no additional processing is necessary to access the energy in the carbon-hydrogen bonds.
How might a change of one amino acid alter an enzyme’s activity?
A change in an amino acid leads to a change in the primary structure of the protein. A change in the tertiary structure means a change in the shape of the protein. If this change affects the active site of the enzyme, the activity of the enzyme will be affected.
Which of the following is not considered a macromolecule?
Lipids: Lipids are not true macromolecules because the monomers are not covalently bonded together. Simple lipids are composed of subunits made of fatty acids covalently bonded to a triose sugar – glycerol.
What would happen to an enzyme if the gene that codes for it was altered by a mutation?
Causes of mutation Most are caused by errors when the DNA is copied prior to cell division. ionising radiation.
Why can mutation impact enzyme action?
A mutation is a change in the DNA base sequence. This causes a change in the amino acid that is synthesised, and this could change the shape of the active site on an enzyme. The shape of the active site may not be complimentary to the substrate anymore, so the substrate may bot be able bind to the active site.
Which is the incorrect association between monomer and polymer?
39 Cards in this Set
| Which of the following is considered a macromolecule? | Nucleic acid |
|---|---|
| Which is the INCORRECT association between monomer and polymer? A) monosaccharide – polysaccharide B) nucleic acid – polypeptide C) nucleotide – nucleic acid D) amino acid – polypeptide | nucleic acid – polypeptide |
Why might we refer to a complex carbohydrate as a time release pellet of energy?
are made up of one sugar unit or building block. Why might we refer to a complex carbohydrate as a “time release” pellet of energy? Simple sugars become available gradually as the complex carbohydrates are broken down into their simple sugar components.
How would a mutation that causes a change in protein structure impact an enzyme’s ability to function?
If mutations occur in the polypeptide chain and the order of amino acid changes, then the structure of the enzyme will change as well. The functions of an enzyme are greatly influenced by its structure, so a mutation will affect the enzyme’s ability, and it will not function accurately.
Why might a change of one amino acid at the active site not alter an enzyme’s substrate specificity?
How might a change of one amino acid at a site, distant from the active site of an enzyme, alter an enzyme’s substrate specificity? An amino acid change away from the active site cannot alter the enzyme’s substrate specificity. Which of the following is an example of potential rather than kinetic energy?
What can happen if an enzyme is altered even slightly quizlet?
What can happen if an enzyme is altered, even slightly? Its active site may change, causing the enzyme to stop functioning. The secondary structure of a protein refers to the: twisting of the amino acid chain into a corkscrew-like shape or zigzag folding pattern.
Is insulin a macromolecule?
Insulin is a protein composed of two chains, an A chain (with 21 amino acids) and a B chain (with 30 amino acids), which are linked together by sulfur atoms. Insulin is derived from a 74-amino-acid prohormone molecule called proinsulin.