Discuss how mutations that eliminate or alter the activity of an enzyme can cause phenotypic effects
What will be an ideal response?
The substrate for the blocked reaction may build up and reach toxic levels, causing an abnormal phenotype. In addition, the enzyme may control a reaction that produces a molecule needed for some cellular function. If this product is not made, a mutant phenotype may result. Mutations that affect enzymes can produce many different phenotypes, ranging from inconsequential to lethal.
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What is true about reciprocal translocation heterozygotes and inversions? (Select all that apply.)
A) The amount of DNA in the genome remains the same. B) The genes at the boundaries may be disrupted, while those in the middle are most likely unaffected. C) Up to 50% of gametes may be unbalanced, resulting in semisterility. D) They are both used to make Balancer chromosomes.
The types of bonds found in nucleic acids are:
A. phosphodiester bonds. B. ionic bonds. C. peptide bonds. D. nonpolar covalent bonds.
Which nutrient molecule CANNOT be used in the oxidative pathways?
a. fatty acids b. protein c. glucose d. cholesterol
Elsa cut her finger on a piece of ice and then fell into some mud. Her friend Olaf chuckled and then helped her out of the mud. She decides to do a disk diffusion test to determine which antiseptic to use on her cut. In general the _______________ (smallest, largest) zone of inhibition will indicate the most effective antiseptic to use.
Fill in the blank(s) with the appropriate word(s).