Proteins are composed of subunits called ____ linked together by chemical bonds
a. nucleotides
b. polynucleotides
c. mRNAs
d. amino acids
e. proteasomes
d
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Malaria is caused by Plasmodium falciparum, a non-motile protist that contains a cluster of microtubules at one end of the cell. Once injected into the blood stream, these microtubules are used to attach to red blood cells. Malaria is transmitted by:
a. The bite of a tsetse fly b. The bite of a mosquito c. The bite of a sand fly d. The bite of a kissing bug e. Ingesting food
The enterobacteria in the order Enterobacteriales are readily distinguishable from one another by morphological criteria.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. Most plants transport sucrose over long distances through the xylem. 2. Vessels of the xylem are dead cells and therefore can transport water and minerals upward in the plant. 3. The Casparian strip prevents apoplastic movement through epidermal cells. 4. Plants that grow in salt marshes must have a mechanism for coping with potential osmotic stress in their cells. 5. When plants take up water and minerals these must pass through both a cell wall and a membrane.
Which element is considered a micronutrient needed by plants?
a. carbon b. hydrogen c. nitrogen d. magnesium e. zinc