Which microorganisms are the most susceptible to chemical disinfection?
A) Gram-positive bacteria
B) Gram-negative bacteria
C) Mycobacteria
A) Gram-positive bacteria
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The structure identified by the arrow is _____
1.the round window, which is activated by the stirrup
2.the cochlea, made up of the vestibular duct and the tympanic duct
3.the organ of Corti, which is made up of hair cells
4.the tympanic membrane, which vibrates when sound waves hit it
Each of the following is a product of the citric acid cycle except
A) CO2. B) ATP. C) NADH. D) acetyl CoA. E) FADH2.
Which types of phenotypic ratios are likely to occur in crosses when dealing with three gene pairs for which all the genotypic combinations are of equal viability?
A) 12:3:1, 9:7 B) 1:2:1, 3:1 C) 2:3, 1:2 D) 1:4:6:4:1, 1:1:1:1 E) 27:9:9:9:3:3:3:1
A double-stranded DNA molecule can be separated into single strands by heating it to 90°C because _______________________
(a) heat disrupts the hydrogen bonds holding the sugar–phosphate backbone together. (b) DNA is negatively charged. (c) heat disrupts hydrogen-bonding between complementary nucleotides. (d) DNA is positively charged.