Prokaryotes are classified into which domain(s)?
A) Domain Archaea only
B) Domain Bacteria only
C) Domains Archaea and Bacteria only
D) Domains Bacteria and Eukarya only
Ans: C) Domains Archaea and Bacteria only
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The phenotype of a person with alpha thalassemia depends on the
A) number of beta globin genes. B) presence or absence of a sickle cell mutation. C) number of alpha globin chains. D) rate of replication of the alpha globin genes.
A cell in the G2 phase:a
has twice the amount of DNA present in a telophase nucleus.
b. has visibly distinct chromosomes. c. lacks a visible nuclear membrane. d. is in mitosis. e. is in cytokinesis.
In the 'Lysine Iron Agar', Yellow Butt can be interpreted as
A. LDC (+) B. Hydrogen sulfide is produced C. LDC (-) D. LDA (+)
Which of the following is the best evidence for a three-domain system?
A) Nucleotide sequences in ribosomal RNA vary between all three domains. B) There are three distinctly different sets of metabolic reactions. C) There are three distinctly different Gram reactions. D) Some bacteria live in extreme environments. E) There are three distinctly different types of nuclei.