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

Biology & Microbiology

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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.

Biology & Microbiology

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?

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology