Two principal organelles in eukaryotes that were apparently derived from different types of bacteria are the
A. plasma membrane and nuclear membrane.
B. rough ER and smooth ER.
C. mitochondria and chloroplasts.
D. microfilaments and microtubules.
Answer: C
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Zygospores are formed when two haploid hyphae fuse. Zygospores are which of the following?
A. sterile B. asexual C. dikaryotic D. haploid E. diploid
Which of the following items is NOT a part of the name of a restriction enzyme?
A) the Gram reaction of the source bacterium B) the specific epithet of the source bacterium C) Roman numerals to indicate its order of discovery D) the strain of the source bacterium E) the genus of the source bacterium
Which is the correct sequence of events for protein degradation in eukaryotes?
A. ubiquitin binds target protein ? protein unfolds and enters proteasome ? protein directed to proteasome ? protein digested ? amino acids are released and recycled B. ubiquitin binds target protein ? protein directed to proteasome ? protein unfolds and enters proteasome ? protein digested ? amino acids are released and recycled C. protein directed to proteasome ? ubiquitin binds target protein ? protein unfolds and enters proteasome ? protein digested ? amino acids are released and recycled D. protein directed to proteasome ? protein unfolds and enters proteasome ? ubiquitin binds target protein ? protein digested ? amino acids are released and recycled E. protein directed to proteasome ? protein unfolds and enters proteasome ? protein digested ? ubiquitin binds target protein ? amino acids are released and recycled
Most of the plant body is composed of
a. dermal tissue. b. root tissue. c. ground tissue. d. vascular tissue. e. cork tissue.