How do restriction enzymes cut DNA sequences?
a. They cut DNA at sequences that have lots of adenine bases.
b. They have the ability to cut DNA randomly.
c. They cut DNA at sites, called recognition sites, that have specific nucleotide sequences.
Answer: c. They cut DNA at sites, called recognition sites, that have specific nucleotide sequences.
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Plants are capable of growth throughout their entire lifespan because of specialized tissue known as the
A. petiole B. cotyledon C. xylem D. meristem
________ used models to deduce the double helical shape of DNA.
A) Linus Pauling B) James Watson and Francis Crick C) Martha Chase D) Maclyn McCarty
Figure 36.6B
Use the figure above to answer the following question.
The structure between "C" and "E" is the ____.
A. right AV valve B. pulmonary vein C. left AV valve D. pulmonary valve E. aortic valve
The genomes of mammalian mitochondria contain
A. genes whose products are used in translation of mRNA. B. genes for proteins used in oxidative phosphorylation. C. ribosomal genes. D. a total of 37 genes. E. All of the items listed are correct.