At 38, Andrew's mother is symptomless for Huntington's Disease. What are the chances that she has inherited the Huntington's allele from her mother?
a. 1 in 4 (25%)
b. 2 in 4 (50%)
c. 3 in 4 (75%)
d. 4 in 4 (100%)
b
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Which of the following is not a function of the release factors of bacterial translation termination?
A. mediating the hydrolysis of the terminal peptidyl-tRNA bond B. assisting in the initial folding of the nascent polypeptide chain C. releasing the last uncharged tRNA from the P site D. recognition of a stop codon
Sex chromosomes are ____
a. completely different between the two sexes b. partially homologous but also have unique regions c. found only in males d. unable to line up properly at the metaphase plate e. completely homologous but always have different alleles
The two strands of DNA are held together by:
What will be an ideal response?
Which biosafety level is incorrectly matched with its description?
A) BSL-1: non-pathogens or those that rarely cause disease in healthy people B) BSL-3: serious, lethal pathogens though some diseases may be treatable C) BSL-2+: known animal pathogens which do not infect humans D) BSL- 2: known pathogens but the disease is treatable or preventable E) BSL-4: dangerous, lethal pathogens with no cures or treatments