If an amino acid contained a hydrocarbon (a group of multiple carbons and hydrogens linked together) as its side group, in which of the following categories could it be appropriately designated?
A) hydrophilic
B) polar
C) nonpolar
D) basic
E) acidic
C
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Single-celled Paramecium live in pond water (a hypotonic environment). They have a structural feature, a contractile vacuole, which enables them to osmoregulate
If you observed them in the following solutions, at which sucrose concentration (in millimolars, mM) would you expect the contractile vacuole to be most active? A) 0.0 mM sucrose B) 0.05 mM saline C) 0.08 mM sucrose D) 1.0 mM saline
The bacterium that in part causes acne is
a. Propionibacterium b. Porphyromonas c. Streptococcus d. Lactobacillus e. Clostridium
A homozygous dominant parent will produce
a. one type of gamete with this one homozygous allele. b. two types of gamete with this one homozygous allele. c. a mixture of gametes with both homozygous and recessive alleles. d. a single gamete with a single mutant allele. e. none of these.
The infoldings of the inner mitochondrial membrane are called
a. cisternae. b. cristae. c. laminae. d. lacunae.