The protein shugoshin is crucial for meiosis I, because it
A) promotes chiasmata formation.
B) condenses chromosomes.
C) decondenses chromosomes.
D) protects centromere cohesins from degradation by separase.
E) attaches microtubules to kinetochores.
Answer: D
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Prior to secretion, Gram-negative bacterial proteins are translocated across one membrane while Gram-positive proteins are translocated across two membranes.
Answer the following statement true (T) or false (F)
In a class field trip, you scrape what looks like an organism off of a stream rock. Through the semester, with chemical analysis and electron microscopes, you determine that the cell has DNA, RNA, ribosomes, a cell membrane, and cytoplasm. This helps you determine that
A. this is an unusual plant that you collected from the stream. B. this organism you collected is in the Eukarya domain. C. this organism you collected is in the Bacteria domain. D. this organism you collected is in the Archaea domain. E. this is an organism with cells having common features with all life.
The open area or central space in the GI tract is called the ________
Fill in the blank(s) with the appropriate word(s)
Cloned fragments of all of the DNA in a haploid
number of chromosomes characterizing a species is a a. cDNA library. b. transcribed DNA library. c. genomic library. d. gene library. e. plasmid library.