Before a desired gene can be spliced into a bacterial plasmid cloning vector, the gene must first be from the original DNA.
A. precisely cut, with a restriction enzyme,
B. glued, with ligase,
C. injected into a bacterial cell or a virus, having different sequences
D. injected into a stem cell, to determine any unwanted traits
E. All of the answer choices are correct.
A. precisely cut, with a restriction enzyme,
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The bond in table salt (NaCl) is
a. polar. b. ionic. c. covalent. d. double. e. nonpolar
A gene locus is
a. a recessive gene. b. an unmatched allele. c. a sex chromosome. d. the location of an allele on a chromosome. e. a dominant gene
Discuss why it is difficult to trace the origins of viruses and why they are important.
What will be an ideal response?
You are asked to determine if a tissue sample taken from a plant stem comes from a monocot or eudicot. How will you accomplish this?
A. Examine the epidermis and determine the depth of the cuticle layer. B. Locate the vascular bundles and analyze their pattern. C. Determine if the xylem and phloem are located in separate vascular bundles or are bundled together. D. Look at the ground tissue to see if it is arranged in concentric rings or in parallel bundles. E. Examine the vascular cambium and determine if it is divided into segments or is continuous throughout the stem.