Guide (GCU
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181 - Exam 1 Study Guide ( )
which of the following Best describes the logic of scientific inquiry?
I can expect certain test results to see whether I can accept my hypotheis
Which of the following is (are) TRUE for natural selection?
A, B and C
Which of the following BEST demonstrates the unity among all organisms?
DNA Structure and function
All of the following are part of a prokaryotic cell EXCEPT
Endoplasmic reticulumn
About 25 of the 92 natural elements are known to be essential to life. Which 4 of these 25 elements
make up approximately 96% of living matter?
Carbon, hydrogen, nitrogen, oxygen
What kind of chemical bonds between water molecules give water special properties such as high
cohesion, surface tension and the ability to absorb large amount of heat?
Hydrogen bond
What is the difference between covalent bonds and ionic bonds?
Covalent bonds involve the sharing of electrons between atoms, ionic bonds involve donating
and accepting electrons between atoms resulting in the electrical attraction between atoms
The molecular mass of glucose is 180 g/mol. Which of the following procedures should you carry out to
make a 2 M solution of glucose?
Dissolve 180g of glucose in a small volume of water, and then add more water until the final
volume is .5L
Why does ice float in liquid water?
Hydrogen bonds stabilize ad keep the water molecules of ice farther apart than the water
molecules of liquid water
One of the buffers that contributes to pH stability in human blood is carbonic acid. Carbonic acid is a
weak acid that dissociates into a bicarbonate ion and a hydrogen ion Thus,
The HClO3- to act as a base and remove excess H+ with the formation of H2CO3
The element present in ALL organic molecules is
Carbon
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