How could we build a microscope with a higher resolution?
a) Use electromagnetic waves with shorter wave lengths than visible light and use a sensor to produce a picture
b) We could drag a tiny needle over the surface of our sample and record the position of the needle to record the surface structure
c) Electrons have also wave-like properties; we can use magnets instead of lenses and bombard the sample with electrons instead of light
d) All of these answers are good ideas for a high-resolution microscope
Answer: d) All of these answers are good ideas for a high-resolution microscope
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Cytosine and thymine are the two types of bases found in DNA known as ______________________. Fill in the blank(s) with the appropriate word(s)
Which of the following statements regarding coenzymes is true?
A. they are essential for metabolic reactions in animals but not in plants B. They can facilitate metabolic reactions by combining with enzymes at their active sites C. They are minerals that alter the pH of cells and thus increase the probability of chemical reactions D. They are synthesized in the rough endoplasmic reticulum of eukaryotic cells. E. They typically work best at temperatures below 37C
Kidney failure or end-stage renal disease is most commonly associated with
A) diabetes and high blood pressure. B) a low-carbohydrate diet. C) low blood pressure. D) a low-protein diet. E) a high-fat diet and low blood pressure.
Bacteria with small bunches of flagella emerging from the same site are said to be
A) Lophotrichous B) Monotrichous C) Amphitrichous D) Peritrichous E) Spirilla