Mutations that result in the death of an organism when expressed are called ________ mutations.
A. conditional
B. recessive
C. dominant
D. lethal
Answer: D
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What type of monomer does ATP represent?
A. nucleotide B. glycerol C. fatty acid D. monosaccharide E. amino acid
Which of the following statements is TRUE?
A. Interphase chromosomes are loosely compacted, overlapping, and intertwined with each other within the nucleus. B. Interphase chromosomes are loosely compacted and do not associate with histones until the cell is preparing to divide. C. Interphase chromosomes are also known as euchromatin. Condensed, metaphase chromosomes are also known as heterochromatin. D. Radial loop domains are formed due to interactions between 30 nm fibers and intermediate filaments. E. None of these are TRUE
First line defenses have what aspect in common with each other?
a. They involve the production of antibodies. b. They recognize specific pathogens. c. They are physical barriers against invading pathogens. d. They involve unique cells that attack invading pathogens.
Although lacking a TCA cycle and a respiratory chain, ________ can divide with a generation time of eight to ten minutes when growing in a human host.
A. Streptococcus pyogenes B. Staphylococcus aureus C. Helicobacter pylori D. Clostridium perfringens