Hooke and van Leeuwenhoek helped to create the basis of the cell theory by __________.
a. observing and documenting cells, and using microscopes to visualize the invisible structure of living things
b. developing industrial products using microorganisms
c. clarifying the connection between disease and microorganisms
d. proving that living organisms originate spontaneously from nonliving materials
Ans: a. observing and documenting cells, and using microscopes to visualize the invisible structure of living things
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Interphase is made up of what stages of the cell cycle?
A. G1 + G2 + S B. S + cytokinesis C. prophase + metaphase + anaphase + telophase D. cytokinesis + mitosis E. G0 + G1 + G2
You isolate a piece of DNA from a microorganism you cultivated from your teeth. The piece of DNA is 94 kbp is size and is circular
You sequence it and discover that it contains genes for capsule formation, pili, and antibiotic resistance, as well as an origin of replication. What is this piece of DNA and how is it related to the other genetic elements found in prokaryotic cells? What will be an ideal response?
The Miller and Urey apparatus produced hydrogen cyanide (HCN), formaldehyde (CH2O), and glycine (an amino acid) in their first experiment, why was it important that they use water vapor, methane, carbon monoxide, ammonia and hydrogen as their reactants and an electrical spark as their energy source?
A. They knew these reactants were available in their lab and in today's atmosphere.
B. These reactants were found in today's atmosphere therefore they should be used to try to replicate the early Earth atmosphere.
C. Each of the reactants were readily changed into proteins and DNA.
D. These reactants were useful because their products were able to be predicted before the experiment began, it is always good to know the outcome of an experiment to achieve success with the experiment.
E. These reactants were hypothesized to have made up the early Earth atmosphere, the electricity was used to emulate lightening strikes.
Which of the following is a region of DNA at the end of a linear chromosome?
A. Primer B. Telomere C. Intron D. Exon