If a sequence of nucleotides is 27 base pairs long and it is said to have a colinear relationship with the corresponding polypeptide, how many amino acids will be in this peptide?
(Assuming all nucleotides code for an amino acid and that this is a bacterial system)
a. 27
b. 20
c. 9
d. 8
e. 7
Ans: c
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. A sample must contain many microorganisms in order to see any using microscopy techniques. Why?
A. The area on a microscope slide is very large compared to the relative size of microbes, and you take a very small amount of your sample to place on the slide surface. Therefore, you must have a large number of microbes initially in the culture to increase the chances that you'll come across one or more when looking at the slide surface through the magnifying lenses of the microscope. B. Bacteria are very small, of course. If you don't have a LOT of them, how are you going to see them? C. This is false-microscopy allows us to magnify a specimen to the point where we would be able to visualize even just a few microbes on the surface of the slide. As such, even if there are only a few microbes in a sample, we could easily visualize them with a microscope. D. Microscopes only magnify what's on the slide. If you don't have a lot of microbes on the slide surface, you can't magnify the specimen enough to see them as individual cells.
Global warming can affect which of the following?
1.species distributions 2.oxygen carrying capacity of seawater 3.changes in rainfall and wind patterns 4.all of these
Which of the following is thought to be the
descendant of engulfed ancient bacteria? a. nuclei b. Golgi bodies c. ER d. mitochondria e. lysosomes
Which of the following statements is true?
a. Darwin did not know what mechanisms were responsible for the variation he saw. b. The blending theory of inheritance provides excellent support for evolution. c. Darwin received Mendel’s paper but did not understand its significance. d. The explanation for genetics had no implications for evolution. e. All of these are true.