Which part of the innate response cuts holes in the cell membranes of pathogens?

A) fibrin
B) cytokines
C) complement proteins
D) antibodies
E) histamines


Answer: C

Biology & Microbiology

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What would be an easy way to determine if a skull is a mammal's skull? 

A. Look for air sacs in the skull. B. Examine the teeth. C. Look for the remains of the tympanum. D. Measure the brain case volume.

Biology & Microbiology

Two or more alleles of a gene are circulating at relatively high frequency in a population's gene pool. What term describes this state?

a. frequency-dependent selection b. polyploidy c. multiple allele systems d. balanced polymorphisms e. prominent alleles

Biology & Microbiology

The protein encoded by some group II introns has independent endonuclease and maturase activities. What does this suggest about the origin of the intron?

What will be an ideal response?

Biology & Microbiology

Answer the following questions true (T) or false (F)

1. Plants perform only photosynthesis, not cellular respiration. 2. Most plant leaves appear green because they absorb green light. 3. Photosynthesis forms ATP using oxidation-reduction reactions similar to those seen in the electron transport chain of respiration.

Biology & Microbiology