A person is genotypically blood type A. However, this individual also does not produce the lipid to which N-acetylgalactosamine is added, so the lipid is therefore not expressed on the surface of erythrocytes. This situation is known as the Bombay phenotype. When tested, this person will appear to be blood type
A) A.
B) B.
C) AB.
D) O.
D) O.
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Villi and microvilli in the small intestine _____
A) neutralize stomach acid B) activate trypsinogen C) increase the surface area to increase the efficiency of nutrient absorption D) emulsify lipid molecules
________ pathways are those that function both catabolically and anabolically.
Fill in the blank(s) with the appropriate word(s).
The genome of an organism contains 30% adenine. Based on this, you would predict that this organism's genome also
contains 30% ____.
a. thymine b. cytosine c. each of cytosine and guanine d. each of thymine and guanine e. guanine
When E. coli cells produce the amino acid tryptophan, a cluster of five genes is transcribed together. This cluster of genes is referred to as the
A. trp operon. B. trp suppressor. C. trp transcriptional operator. D. trp regulator. E. trp promoter.