Rank the following one-base point mutations (from most likely to least likely) with respect to their likelihood of affecting the structure of the corresponding polypeptide. 1. insertion mutation deep within an intron 2
substitution mutation at the third position of an exonic codon 3. substitution mutation at the second position of an exonic codon 4. deletion mutation within the first exon of the gene A) 1, 2, 3, 4
B) 4, 3, 2, 1
C) 2, 1, 4, 3
D) 3, 1, 4, 2
B
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What kind of bacteria is used to monitor coastal water quality?
a. Cyanobacteria b. Chemosynthetic bacteria c. All of these choices d. Coliform bacteria
Hormone leptin is produced by ____________________ cells.Fill in the blank(s) with the appropriate word(s)
The sessile stage of many cnidarians is a
A. larva. B. polyp. C. medusa. D. zygote.
Acacia trees often have ants that live on them. The ants feed on materials produced by special structures called nectaries, which the tree produces. The ants will attack other animals that begin to feed on the tree and will even cut off small branches of other trees that come in contact with "their" tree. The relationship between Acacia trees and ants is called
A. mutualism. B. competition. C. predator/prey. D. parasite/host.