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Bio 121 Exam 1 Questions and Correct Answer1.
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Bio 121 Exam 1 Questions and CorrectAnswers
Some of the most abundant elements found in living organisms are - correct answers:carbon, hydrogen,
oxygen
Which of the following is not a subatomic particle:
an electron
a methyl group
a proton
a neutron - correct answers:a methyl group
The atomic number of an element is equal to - correct answers:the number of protons in the nucleus of
one atom
What is found in the nucleus of an atom - correct answers:protons and neutron
What determines the chemical behavior of an atom - correct answers:the number of valence electrons
When the concentration of hydrogen ions is higher than the concentration of hydroxide ions in a
solution, then what is the pH of the solution - correct answers:acidic
Since hydrogen and carbon atoms have similar electronegativities, hydrogen and carbon tend to interact
by forming - correct answers:non-polar bonds
Which of the following describes covalent bonds, but not other bonds:
electron transfer from one atom to another
weak bonding
electron sharking - correct answers:electron sharing
, What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? - correct
answers:6
What type of chemical bond forms when an electron is transferred from one atom to another atom -
correct answers:ionic bond
Which of the follow describe water:
non-cohesive
polar
mixed well with oil
low surface tension - correct answers:polar
Why do insects now drown when on water - correct answers:surface tension
One water molecule is attracted to another water molecule, this property of water is called - correct
answers:cohesion
What types of chemical bonds form between one water molecule and another water molecule - correct
answers:hydrogen
In one water molecule, the covalent bonds form between - correct answers:the oxygen atom and the
hydrogen atoms
The substance that all organisms need more than any other substance is - correct answers:water
Which statement is false regarding hydrogen ions:
they contain only one proton
they are positively charged
they are call protons
they are represented as H+
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