The thermoacidophile Sulfolobus acidocaldarius lacks peptidoglycan, but still possesses a cell wall. What is likely to be true of this species?
1. It is a bacterium.
2. It is an archaean.
3. The optimal pH of its enzymes will lie above pH 7.
4. The optimal pH of its enzymes will lie below pH 7.
5. It could inhabit certain hydrothermal springs.
6. It could inhabit alkaline hot springs.
A) 1, 3, and 6
B) 2, 4, and 5
C) 1, 3, and 5
D) 1, 4, and 5
B
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The energy generated in the first electron transfer chain in the light-dependent reactions of photosynthesis is
a. split water into oxygen, hydrogen ions, and electrons b. generate NADPH c. power the ATP synthase enzyme to produce ATP d. pump hydrogen ions into the thylakoid compartment e. generate glucose
If you consider a DNA molecule to resemble a twisted ladder, the rungs of the ladder are paired
nitrogen bases. __________________ Indicate whether the statement is true or false.
If parents with the following genotypes (AABb ´ aaBb) have offspring, what is the probability that they will have an offspring with the genotype (AaBB)?
A. 1/4 B. 1/2 C. 3/4 D. 4/4
The appearance of an egg outside of a goose's nest is called
A. an innate releasing mechanism. B. a sign stimulus. C. imprinting. D. a fixed action pattern.