Energy used in cellular respiration can originate from:

A) carbohydrates only.
B) proteins only.
C) carbohydrates, proteins, and fats.
D) carbohydrates and fats only.
E) proteins and carbohydrates only


C) carbohydrates, proteins, and fats.

Biology & Microbiology

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Corneal implants have been implicated in a few cases of

A. botulism. B. trypanosomiasis. C. Creutzfeldt-Jakob. D. scrapie.

Biology & Microbiology

Respond to statements 99–103 in reference to the five plant

tissues listed below. a. protoderm b. ground meristem c. procambium d. vascular cambium e. cork cambium D 99. This tissue gives rise to periderm. D 100. This tissue gives rise to primary tissue forming xylem and phloem. M 101. This tissue gives rise to primary vascular tissue. D 102. This tissue gives rise to the protective covering that forms the bark of a tree. D 103. This tissue gives rise to the xylem and phloem of an older tree.

Biology & Microbiology

A distinctive feature of spirochaetes is the presence of

A. fimbriae B. endoflagella C. helically arranged pili D. nucleosomes E. variable surface antigens

Biology & Microbiology

Small RNAs can regulate gene expression. One type, called micro RNA (miRNA), acts by binding directly to

A. mRNA to prevent transcription. B. tRNA to prevent transcription. C. mRNA to prevent translation. D. tRNA to prevent translation.

Biology & Microbiology