Which of the following elements is essential for ALL bacterial cells but is considered a micronutrient required at relatively low levels?

a. calcium
b. phosphorus
c. nitrogen
d. selenium


Answer: D

Biology & Microbiology

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Which enzyme assembles new strands of DNA during replication?

a. DNA ligase b. DNA synthase c. primers d. DNA polymerase e. hybridization

Biology & Microbiology

The term reproductive isolation mechanism refers to ____

a. specific areas where males compete or display for females b. the process by which sexual selection evolves within a population

c. a blockage of gene flow between populations d. the inability of a species to continue reproduction e. legal limits to procreation

Biology & Microbiology

The movement of genes from one species into the genome of another is referred to as _____

Fill in the blank(s) with correct word

Biology & Microbiology

Sketch the main elements of an inducible operon, such as the lactose operon, and explain the functions

of the operator and promoter regions. What will be an ideal response?

Biology & Microbiology