Ch. 2 Anatomy Chemistry of Life
A particular atom has 16 protons, 17 neutrons, and 16 electrons. The atomic number is:
16 (always the number of Protons)
Which of the following has thymine as one of its nucleotides?
DNA
Which of the following is a nucleic acid with a double helix structure?
DNA
This lipid can be found in the cell membrane:
Phospholipids and cholesterol
Proteins are very long molecules composed of basic units of
amino acids
Covalent bonds:
are formed when electrons are shared between atoms
Covalent bonds:
are not easily broken
Ca
calcium
C
carbon
Which of the following is a structural protein?
collagen
Which of the following is found in orbitals surrounding the nucleus of the atom?
electron
The "lock and key" model is used to describe the functioning of
enzymes
Which of the following acts as a chemical catalyst?
enzymes
Which of the following is an example of a functional protein?
enzymes
Which of the following is an example of a monosaccharide?
glucose
Liver cells and muscle cells are able to store chains of glucose in a molecule called:
glycogen
Which of the following is a polysaccharide?
glycogen
A base:
has a pH greater than 7 and has more OH- ions than H+ ions in solution
An acid:
has a pH less than 7
If an atom has 20 protons and 18 electrons, it would:
have a plus 2 charge
H
hydrogen
Which of the following is not a subatomic particle that makes up the atom?
ion
A solution with a pH of 11:
is a base and has 10 times more OH- ions than a solution with a pH of 10
When the body removes CO2 by way of the respiratory system:
it raises the pH of the blood
Which of the following organs helps maintain the proper pH of body fluids:
kidneys by forming urine and lungs by exhaling carbon dioxide.
Compounds are:
made up of two or more different types of atoms
Random question!! which metric unit is closest to the yard in the English system?
meter
Which of the following carries no electrical charge?
neutron
This subatomic particle is found in the nucleus of the atom
neutron and proton
K
potassium
Which of the following carries a positive electrical charge?
proton
The atomic number of an atom is equal to the number of:
protons.
If a molecule "disassociates" in water it:
separates to form free ions
Na
sodium
The energy of ATP is produced by:
splitting it into ADP and inorganic phosphate.
Which of the following statements is true?
the process of dehydration synthesis is used to build a larger molecule from matter molecules.
Which of the following is not true of enzymes?
they function on the lock and key model, they are functional proteins, and they are catalysts.
This molecule is found in RNA but not DNA:
uracil
Ionic bonds
usually dissolve in water, produce ions when dissolved in water, are formed by atoms of opposite charge.
In a dehydration synthesis reaction:
water is a product
In a hydrolysis reaction:
water is a reactant
Which of the following is not true of water?
water is the most abundant organic compound in the body.