________ is/are able to degrade infecting bacteriophage DNA, thus protecting the host cell.

A. Restriction endonucleases
B. Protection exonucleases
C. Modification methylases
D. Lysozyme


Answer: A

Biology & Microbiology

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The ________ are the tubular structures that occur between the ovaries and the uterus

Fill in the blank(s) with correct word

Biology & Microbiology

The structure labeled A in Figure 27-1 is a:


a. gametangium of an alga.
b. gametangium of a plant.
c. germinating spore.
d. megasporangium of an alga.
e. megasporangium of a plant.

Biology & Microbiology

Small circular pieces of bacterial DNA that are used as vectors in cloning experiments are called _____

A. phages B. viruses C. plasmids D. chromosomes

Biology & Microbiology

____ allow honeybees to navigate

a. Mechanoreceptors b. Chemoreceptors c. Thermoreceptors d. Photoreceptors e. Magnetoreceptors

Biology & Microbiology