Question

glycogen
dna
true or false. changing one nucleotide in a dna molecule can change the function of the entire molecule.
label the parts of the nucleotide.
b
a
c
what is the property of lipids that makes it a good membrane for cells?
what is the purpose of an enzyme in a chemical reaction?
what conditions affect an enzymes ability to function at optimal potential?
1-
2-
3-
using the picture to the right, explain how an enzyme works.
substrate
active site
enzyme

Explanation:

1. Changing one nucleotide in a DNA molecule can indeed change the function of the entire molecule due to the genetic code's nature. A single - nucleotide polymorphism (SNP) can alter the amino - acid sequence during protein synthesis, thus affecting protein function.
2. For the nucleotide labeling: A is the 5 - carbon sugar (deoxyribose in DNA), B is the phosphate group, and C is the nitrogenous base.
3. Lipids are amphipathic (having both hydrophilic and hydrophobic regions), which allows them to form a semi - permeable bilayer, making them suitable for cell membranes.
4. Enzymes lower the activation energy of a chemical reaction, increasing the reaction rate.
5. Conditions affecting an enzyme's optimal function include temperature, pH, and substrate concentration. High or low temperatures can denature the enzyme, extreme pH can disrupt its structure, and substrate concentration can affect the rate of binding to the active site.
6. An enzyme works by having a specific active site with a unique shape. The substrate binds to the active site, forming an enzyme - substrate complex. The enzyme catalyzes the reaction, and the products are then released from the active site.

Answer:

1. True
2. A: 5 - carbon sugar, B: Phosphate group, C: Nitrogenous base
3. Amphipathic nature allowing semi - permeable bilayer formation
4. Lower activation energy to increase reaction rate
5. 1. Temperature, 2. pH, 3. Substrate concentration
6. Substrate binds to the active site of the enzyme, forming an enzyme - substrate complex. The enzyme catalyzes the reaction and products are released.