Which of the following are components of the ATP molecule? (Check all that apply.)
A. Adenine
B. Phosphates
C. Deoxyribose
D. Ribose
Answer: D
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To remove noncoding sequences in the pre-mRNA of eukaryotes, multiple snRNPs combine with proteins to form a larger complex called the ___________ .
A. 5' cap B. introsome C. ribosome D. spliceosome E. 3' poly-A tail
Cloning vectors can be distinguished from expression vectors by
A) carrying ori genes for replication of the cloned sequence. B) having a multiple cloning site (MCS). C) having a high copy number per cell. D) lacking a promoter site upstream of the insertion site.
Potassium-40 is useful in determining the age of a fossil in samples
A. 300,000 years of age and older. B. aged between 100,000 and 250,000 years. C. aged between 50,000 and 100,000 years. D. less than 50,000 years of age. E. less than 25,000 years of age.
Viruses are made of the same four types of biological molecules as living cells. These include all of the following except
a. lipids. b. capsids. c. carbohydrates. d. proteins. e. nucleic acids.