Assuming complete dominance, what is the expected ratio of phenotypes of the offspring following the cross of two heterozygotes?
A. 1:2:1
B. 3:1
C. 1:1
D. 4:1
Answer: B
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The electron transport system
A. requires a membrane. B. utilizes the nuclear membrane of eukaryotes. C. utilizes the mitochondrial membrane of prokaryotes. D. generates a concentration gradient of protons. E. requires a membrane AND generates a concentration gradient of protons.
In scleroderma, patients develop a buildup of collagen in their organs. Scleroderma is a disease of what tissue type?
A. Epithelial tissue B. Muscle tissue C. Connective Tissue D. Nervous tissue
One technique for staining bacteria for viewing under the microscope is called the Gram stain. In this technique, alcohol is used as a decolorizer because it degrades the outer membrane found in some bacteria. What chemical component of the cell does alcohol affect?
A. Nucleic acids B. Carbohydrate C. Lipid D. Protein
Can the PCR technique be used to copy an entire chromosome all at once?
A. No, the PCR machine can only copy fragments of DNA. B. No, only the genes would be copied. C. Yes, that is its primary function. D. There is not enough information provided to answer