Which term refers to a nutrient that is required by a microorganism in large quantities for use in cell structure and metabolism?

A. element
B. growth factor
C. trace element
D. macronutrient


Answer: D

Biology & Microbiology

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Which early scientist proposed that cells arise only from preexisting cells by a process of division?

a. Anton van Leeuwenhoek b. Robert Brown c. Matthias Schleiden d. Theodor Schwann e. Rudolf Virchow

Biology & Microbiology

A key advantage of having a four-chambered heart is ____

a. only oxygen-rich blood flows to tissues b. blood pressure in the separate circuits is not independently controlled c. two separate circuits are possible d. lungs are only possible with a four-chambered heart e. blood oxygenates more quickly

Biology & Microbiology

The transfer of electrons from one compound to another is equivalent to __________ transfer

a. heat b. oxygen c. enzymatic d. phosphorus e. energy

Biology & Microbiology

DNA helicase and topoisomerase are similar insofar as they promote the unwinding and uncoiling of DNA.

Answer the following statement true (T) or false (F)

Biology & Microbiology