If phospholipids form a spherical structure when placed in water, then which of the following is the
most logical conclusion about those phosopholipid molecules?
a. They are not amphipathic.
b. They contain two fatty acid chains.
c. They are cone-shaped.
d. They form a bilayer.
e. Both their ends are hydrophilic
C
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Which of the following is a possible human genotype that could result from nondisjunction of the sex chromosomes in one of the parental gametes?
A. XXY B. XYY C. XXX D. XO E. All of the answer options are correct.
Which one of the following describes a tRNA molecule that specifically recognizes the codon for the amino acid histidine, but is covalently bound (charged with) to the amino acid serine?
A. histinyl-tRNASer B. histinyl-tRNAHis C. seryl-tRNASer D. seryl-tRNAHis
The __________ is the pelvic girdle, pectoral girdle, and paired limbs. Fill in the blank(s) with the appropriate word(s)
A type of virus that infects only bacteria is called a
A) bacteriophage B) retrovirus C) rhinovirus D) coronavirus