The following pedigree is following the inheritance of an autosomal recessive disorder. Which individuals MUST be heterozygotes?
a) Only 1, 2, 5 and 6
b) Only 1 and 2
c) Only 4 and 8
d) Only 1, 2, 3, 5 and 6
Answer: a) Only 1, 2, 5 and 6
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What is the benefit of using Taq polymerase in PCR?
A. Because it is taken from a bacteria with a circular DNA molecule, the DNA molecule doesn't shorten during PCR. B. Because it is taken from a bacteria, this enzyme works much quicker than other types of DNA polymerase. C. Because it is taken from a bacteria that lives in high temperatures, it does not denature and more DNA polymerase does not have to be added after every cycle. D. Because it is taken from a bacteria, this polymerase makes fewer mistakes. E. None of the answer options are correct.
Using protein gel electrophoresis to measure genetic variation in populations has some drawbacks. Which of the following is/are problems with the technique? Select all correct
What will be an ideal response?
What feature of the plasma membrane is primarily responsible for the selective uptake and export of ions and molecules from the cell?
A. cellular membranes exhibit fluid-like properties B. the phospholipid lipid bilayer has a hydrophobic interior C. the extracellular leaflet is rich in glycolipids and glycoproteins D. many transmembrane proteins can rotate and move laterally in the plasma membrane
P700 is located in photosystem ____ and is comprised of chlorophyll ____
a. I; b b. I; a c. II; b d. II; a e. I and II; a