If you place your hand on the trunk of a tree that is 3 feet in diameter, the tissue you would be touchingis:a
epidermis.
b. secondary xylem.
c. cork cambium.
d. cork parenchyma.
e. cork.
E
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When phage ? enters the lytic cycle
A. many new copies of the phage genetic material and coat proteins are assembled to make new phages. The host cell is lysed B. many new copies of the phage genetic material and coat proteins are assembled to make new phages. The host cell remains intact. C. the genetic material of the phage is integrated into the chromosome of the bacterium. D. it immediately lyses the host cells without producing any new viruses.
Determining the exact nucleotide sequence of a gene or gene fragment obtained from an unknown organism is based on which of the following methods?
a. Hybridization b. Sequencing c. Amplification (PCR) d. Genotypic
Helicase ____
a. proofreads the newly synthesized DNA b. relieves over-twisting ahead of the DNA replication fork c. rewinds the newly synthesized DNA strands into a double-stranded helix d. unwinds the double-stranded DNA helix e. binds DNA polymerase to the template strand
In knockout experiments, _______________.
A. genes are added to chromosomes B. normal genes are replaced physically by mutated genes C. genes are mutated or deleted to prevent their expression D. mRNAs are prevented from attaching to ribosomes E. the protein products of specific genes are inactivated