Normally, complement proteins are active until the body is exposed to antigen. Indicate whether the statement is true or false
False - inactive
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Answer the following statements true (T) or false (F)
1. If a researcher determines that 25% of a liver cell's total genome encodes genes for metabolic enzymes, then he/she should assume that metabolic enzymes make up 25% of the total protein composition of the cell. 2. Liver and muscle cells have different sets of genes. 3. A single pre-mRNA can be alternatively spliced into more than one type of mRNA. 4. If an acetyl group is added post-translationally to a protein, it can be subsequently removed.
A 45× objective and a 10× ocular produce a total magnification of
A. 145×. B. 900×. C. 450×. D. 55×.
Wetlands in which considerable amounts of water are retained by an accumulation of partially decayed organic matter are referred to as ________
Fill in the blank(s) with correct word
Cycads may be characterized as being:a
dioecious and having motile sperm. b. the most primitive flowering plants. c. monoecious and having motile sperm. d. dioecious and having non-motile sperm. e. monoecious and having non-motile sperm.