Chemical synthesis of DNA:
A. requires attachment of a starting nucleotide to a glass or polystyrene bead through its 5'
phosphate.
B. proceeds in the 5' to 3' direction.
C. requires transient protection of the nucleotide's functional groups by chemical modification.These protective modifications are reversible.
D. requires that the chemical group used to protect the 3'OH of the pentose is removed at the beginning of each cycle.
E. can be used to synthesize small chains of nucleotides up to 10 bases.
C
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The gene for Tay-Sachs disease codes for a nonfunctional form of the enzyme hexosaminidase A (or Hex
A). It has been found that a person with only one-third the maximum amount of Hex A can function absolutely normally. Please characterize the heredity of Tay-Sachs disease. A) codominant B) recessive C) dominant D) multiple allelic
Which organelle would you expect to find in plant cells but not animal cells?
A. mitochondrion B. ribosome C. chloroplast D. smooth endoplasmic reticulum
In C3 plants, the Calvin cycle occurs in the chloroplasts of ________ cells, but in C4 plants, the Calvin cycle occurs in the ________ cells
Fill in the blank(s) with correct word
Which of the following is a product of recombinant DNA technology?
A) rice that produces vitamin C B) bacteria that produce insulin C) yeast that produces alcohol D) bacteria that produce acetone E) microbes that digest cellulose