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Biochemistry -2022 Exam 1 Practice Questions( with 100% verified correct answers)

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Biochemistry -2022 Exam 1 Practice Questions( with 100% verified correct answers)In a bacterial cell, the DNA is in the: A) cell envelope. B) cell membrane. C) nucleoid. D) nucleus. E) ribosomes... . - ✔✔nucleoid A major change occurring in the evolution of eukaryotes from prokaryotes was the development of: A) DNA. B) photosynthetic capability. C) plasma membranes. D) ribosomes. E) the nucleus - ✔✔the nucleus In eukaryotes, the nucleus is enclosed by a double membrane called the: A) cell membrane. B) nuclear envelope. C) nucleolus. D) nucleoplasm. E) nucleosome. - ✔✔nuclear envelope The dimensions of living cells are limited, on the lower end by the minimum number of biomolecules necessary for function, and on the upper end by the rate of diffusion of solutes such as oxygen. Except for highly elongated cells, they usually have lengths and diameters in the range of: A) 0.1 µm to 10 µm. B) 0.3 µm to 30 µm. C) 0.3 µm to 100 µm. D) 1 µm to 100 µm. E) 1 µm to 300 µm - ✔✔0.3 µm to 100 µm The bacterium E. coli requires simple organic molecules for growth and energy—it is therefore a: A) chemoautotroph. B) chemoheterotroph. C) lithotroph. D) photoautotroph. E) photoheterotroph - ✔✔chemoheterotroph [Show More]

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