Which of the following types of membrane proteins are responsible for facilitated diffusion?
A) Connection proteins
B) Enzymes
C) Transport proteins
D) Receptor proteins
E) Recognition proteins
C
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If you think of the earthworm body plan as a drinking straw within a pipe, where would you expect to find most of the tissues that developed from endoderm?
A) lining the straw B) lining the space between the pipe and the straw C) forming the outside of the pipe D) forming the outside of the straw
When does gene expression occur?
a. when a gene is turned on to produce RNA b. when a gene is turned on to produce DNA c. when a gene is turned on to begin the cell cycle d. when a gene is turned on to begin the process of apoptosis
CREB is a stretch of DNA.
a. true b. false
Assume that a mutation occurs in the gene responsible for the production of hexosaminidase A, such that only about 50 percent of the enzyme activity is found in the heterozygote compared with a homozygous normal individual
If heterozygotes are phenotypically normal, we would say that the mutant allele is recessive to its normal allele. Indicate whether the statement is true or false