Phagocytosis is defined as

a. the ingestion of solid material by a eukaryotic cell.
b. the uptake of liquid material by a eukaryotic cell.
c. cells of the immune system that ingest pathogens.
d. the feeding of protozoans.


Answer: a. the ingestion of solid material by a eukaryotic cell.

Biology & Microbiology

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1) The alteration of gene activity without DNA sequence change. _____ 2) The science of making a living cell perform a task considered useful by humans in a controlled way. _____ 3) The RNA "words" are called this. _____ 4) The process of replacing a faulty gene with healthy functional genes. _____ 5) An enzyme that binds with the promoter on DNA and then synthesizes mRNA. _____ 6) According to base-pairing rules, adenine will pair only with this. _____ 7) An individual's complete set of DNA. _____ 8) Enzymes that link the sugars and phosphates of the newly attached nucleotides to form a new strand during DNA replication. _____ 9) According to base-pairing rules, cytosine will pair only with this. _____

A) Thymine B) DNA polymerases C) RNA polymerase D) Codons E) Guanine F) Gene therapy G) Epigenetics H) Biotechnology I) Genome

Biology & Microbiology

In bacterial cell division, the cell divides into two nearly equal halves.  This process is referred to as:

A. binary fission B. cytokinesis C. meiosis D. mitosis E. fusion

Biology & Microbiology

__________ prevent fish sperm from fertilizing frog eggs

a. Energetic barriers b. Biological barriers c. Postzygotic barriers d. Ecological barriers e. Prezygotic barriers

Biology & Microbiology

How many turns of the Krebs cycle are needed to completely break down one molecule of glucose?

A) one B) two C) four D) three

Biology & Microbiology