Biology Final: Test 1
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- All living organisms _____.
- use energy
- K=atomic number=19 If K has a neutral charge, then how many electrons does it have in its outer shell?
- 1
- If K+ has a positive charge, then it could contain which of the following number of electrons?
- 18
- K+ is a/an __.
- ion
- K+ has how many protons?
- 19
- If K atom loses an electron to a Mn atom, then the K ion would have a __ charge, and Mn would have a __ charge.
- +,-
- If the K ion and the Mn ion were bonded together by their difference in charge, then it would create a/an ____ bond.
- ionic
- If the +hydrogen end of a water molecule is attracted to the negative nitrogen end of an ammonia molecule then this would be an example of a _______.
- hydrogen bond
- In NH3, the electrons are pulled towards the nitrogen end of the molecule. So the nitrogen end is more negative and the hydrogen end is more positive. This would be an example of a ______.
- polar covalent bond
- You drop salt into water. The saltwater is a/an ____.
- solution
- Water is more dense than ice.
- True
- If a molecule of HIis dropped into solution, it will break apart into H+ and I- ions. HI is a/an ____.
- acid
- A solution has 3 H+ ions and 4OH- ions. Solution is _____.
- basic
- The pH of the above situation would be _______.
- greater than 7
- pH of greater than 7=____
- basic
- pH of less than 7=_____
- acid
- The pH in your blood always stays between ___ and ___.
- 7.3 and 7.5
- The pH in your stomach would be very ____.
- acidic
- If someone\'s lungs are not working properly and they can\'t exhale carbon dioxide efficiently, then they might suffer from ______.
- acidosis
- Saturated fatty acids contain all single bonds between carbons.
- TRue.
- In what food would you find high levels of unsaturated fatty acids?
- fish
- What can\'t be digested by humans?
- cellulose
- Chitin is a type of ___.
- carbohydrate
- You want your HDL count to be high, and your LDL count to be low.
- True
- DNA is instructions for how to build ___.
- proteins
- The building blocks of nucleic acids are ______.
- nucleotides
- If your ____ are not working properly, you might be born with webbing between your fingers and toes.
- lysosomes
- How might prokaryotic organisms potentially affect your life?
- they might make you sick.
- If someone develops a tolerance to alcohol, it is because the amount of ________ increases in the cell.
- smooth endoplasmic reticulum