Trypan blue is
a. taken up by living cells.
b. taken up by dead cells.
c. taken up by both living and dead cells.
d. used to identify plant cells.
b
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When DNA is replicated, ____
a. parental histones are degraded and entirely replaced by new histones b. DNA is permanently freed from histone binding
c. the histone proteins are also replicated d. only some of the histone proteins are replicated e. the number of histones that bind to each DNA molecule is halved
Plant cells called ____ make up the bulk of the soft primary growth of roots, stems, leaves, flowers, and fruits
a. sclerenchyma b. tracheids c. collenchyma d. parenchyma e. vessel members
Identify the mode of inheritance of the trait.
Above is a pedigree for a common human trait (not a disease) controlled by a single gene. Shaded symbols are for individuals exhibiting the trait.
A) Dominant
B) Recessive
C) Either dominant or recessive
D) Cannot be determined
Measles is described as a ________ skin lesion.
A. pustular B. maculopapular C. vesicular D. bulla E. macule