In the lysogenic bacteriophage life cycle, the ? chromosome
A) replicates and the phage genes take over the bacterium.
B) inserts itself physically into the host cell's chromosome.
C) expresses a repressor protein gene that inhibits the lytic pathway.
D) is replaced by a piece of bacterial DNA when packaged inside phage progeny.
E) Both B and C
E
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The method of sequencing genomic fragments cloned straight from the genome is:
A. Cytogenetic mapping B. Shotgun sequencing C. Southern blotting D. Polymerase chain reaction
In DNA the pyrimidines are
a. thymine and cytosine. b. adenine and cytosine. c. adenine and guanine. d. thymine and adenine. e. guanine and thymine.
When phospholipids are mixed with water their interact with water and their are repelled, forming a lipid bilayer.
A. hydrophilic tails; hydrophobic heads
B. hydrophilic heads; hydrophobic tails
C. hydrophobic heads; hydrophilic tails
D. hydrophobic tails; hydrophilic heads
E. hydrophilic heads; hydrophilic tails
The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called ________.
A. proteins B. carbohydrates C. fats D. phospholipids