Which of the following is considered the first group of organisms to have developed?
A. Archaea
B. Eucarya
C. Bacteria
D. Protozoa
C. Bacteria
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Which of the following is important for allowing large, charged molecules to pass through the membrane?
A. peripheral proteins B. cholesterol C. glycosylated lipids D. transmembrane proteins E. carbohydrate channels
The streamlined shape of the dolphin, seal, and other swimming animals is most important for which of the following reasons?
A. reducing drag from the water they must swim through B. overcoming the forces of gravity acting on the animal C. reducing the density of the water they must swim through D. maintaining a low speed in the dense medium E. All of the choices for this question are correct
During normal DNA replication, part of the sequence at the ends of linear chromosomes is not copied into the new
DNA strands because ____.
a. DNA ligase cannot join pieces at the end of a chromosome b. RNA primers at the beginning of a new strand cannot be replaced with DNA c. those ends are Okazaki fragments that are lost d. cells do not need the DNA at the ends of chromosomes e. the ends of chromosomes are made of protein, not DNA
Name at least two typical characteristics of a DNA cloning plasmid
What will be an ideal response?