The approximate size of DNA fragment can be estimated on a gel using the:
What will be an ideal response?
DNA ladder
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Based on the figure, which of the following is true of HIV?
A. It uses reverse transcriptase from the cell to make DNA.
B. It replicates in the nucleus of cells.
C. It contains DNA as its genetic material.
D. It is an enveloped virus.
E. It lyses cells when it is released.
Naturally-produced penicillins are most effective against gram-positive bacteria because _______.
Fill in the blank(s) with the appropriate word (s).
A parasitic plant without chlorophyll is likely to lack leaves.
Answer the following statement true (T) or false (F)
Which of the following is not true of the genus Lactobacillus?
A. They are responsible for spoilage of beer, milk, and meat. B. Many species are pathogenic in humans and animals. C. They are used in the production of fermented vegetable foods, beverages, sour dough, hard cheeses, yogurt, and sausages. D. They do not produce endospores.