Peptidoglycan is a unique macromolecule found in bacterial ________.
A. cell membranes
B. slime layers
C. capsules
D. inclusions
E. cell walls
Answer: E
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Which of the following is NOT a reason for the high fidelity of the newly synthesized DNA molecule?
A. The hydrogen bonding between purines and pyrimidines is stable. B. The DNA polymerase is unlikely to form bonds between nucleotides if they are mismatched. C. The DNA polymerase has exonuclease functions. D. The DNA polymerase has the ability to change the structure of the base in order to form the correct bond
Muscle cells are stimulated by acetylcholine released from the terminals of
A. transverse tubules. B. motor cell axons. C. sensory cell axons. D. motor cell dendrites. E. sensory cell dendrites.
Which of these plant tissue types is composed of hollow nonliving tracheids and vessel elements that transport water and nutrient minerals from the roots to the leaves?
A. parenchyma B. phloem C. xylem D. collenchyma E. sclerenchyma
The idea that alleles of a particular gene separate independently into individual gametes during meiosis is Mendel's principle of ________.
a. unit inheritance b. segregation c. independent assortment d. dominance