In Tay-Sachs disease, individuals inherit genes with a mutation that causes an inability to produce ______________ in their lysosomes.
A) mRNA
B) tRNA
C) rRNA
D) a lipid-digesting enzyme
E) aldehyde dehydrogenase
D) a lipid-digesting enzyme
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Plasmids are ____
a. enzymes that cut DNA b. RNA molecules c. small proteins that help replicate cloned genes d. protein-coding genes in the chromosome e. circular DNA molecules that replicate separately from chromosomal DNA
Imagine a red blood cell leaving the right ventricle of your heart. To which chamber of the heart will that cell return first?
A. right atrium B. left ventricle C. right ventricle D. left atrium E. It is impossible to say from the information given.
What is the term for an observable trait of an organism?
A) allele B) genotype C) hybrid D) phenotype E) element
The most common infectious disease(s) is/are
A) gonorrhea. B) influenza. C) hepatitis. D) colds.