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CB quiz 1

Terms in this set (13)

Which of the following is not true?(1)
All cells die
What is the difference between Archaea and Bacteria?
They differ in their cell wall and membrane compositions, as well as in their protein synthesis machinery.
You are studying a cell under the microscope and you see that it is very small (about 5 micrometers in diameter); it lacks membrane bound organelles; it has circular DNA; but lacks a true nucleus. What type of cell could it be?
Bacteria Cell
Which of the following would be possible outcome/s of hematopoietic stem cell mitosis?
The daughter cells could be more hematopoietic stem cells identical to the parent, blood cells, or various white blood cells
You have a patient in the late stages of a fatal degenerative disease that has been approved for a clinical trial in adult stem cell research, but the patient refuses, because he is morally opposed to abortion/destruction of human life. How should you proceed?
Explain the difference between adult and embryonic stem cells
Infectious particle with protein coat surrounding DNA, diameter less than .1 micrometer, never grows, and no internal metabolism or homeostasis. What is it?
Virus
What is the endosymbiotic theory?
explains how eukaryotic cells may have evolved from prokaryotic ancestors that were highly dependent on one another; is based on various properties of mitochondria and chloroplasts
How do you determine the charge of an atom?
Compare the number of protons to electrons
Oxygen is an element with 8 protons and 8 electrons, but the valence shell only has 6 electrons because 2 are in the first shell. Is a neutral oxygen atom stable?
No, because when the atom is neutral, its outer electron shell is not full
You are studying a molecule of hydrogen and learn that the bond between two hydrogens is formed by sharing one pair of electrons. What can you deduce about the bond?
The bon is a nonpolar and covalent
What is electronegativity?
Ability of an atom to attract electrons
Why do oxygens in water have a partial negative
Because oxygen is more electronegative than hydrogen
Which pair of molecules below are most likely to hydrogen bond?
Two molecules of water
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