AP unit 1 CH1-4 Flashcards
Choose the answer that best describes HCO3-.
bicarbonate ion
Which property of water is demonstrated when we sweat?
Which of the following is a neutralization reaction?
Which of the following is a neutralization reaction?
HCl + NaOH → NaCl + H2O
The numbers listed represent the number of electrons in the first, second, and third energy levels, respectively. On this basis, which of the following is an unstable or reactive atom?
2, 8, 1
Carbohydrates and proteins are built up from their basic building blocks by the ________.
removal of a water molecule between each two units
What happens in redox reactions?
both decomposition and electron exchange occur
Which of the following statements is false?
Larger particles move faster than smaller ones and thus collide more frequently and more forcefully.
Two good examples of a colloid would be Jell-O® and ________.
cytosol
An example of a coenzyme is ________.
riboflavin (vitamin B2)
Atom X has 17 protons. How many electrons are in its valence shell?
7
A chemical reaction in which bonds are broken is usually associated with ________.
the release of energy
Salts are always ________.
ionic compounds
What is a dipole?
a polar molecule
Choose the statement that is false or incorrect.
A key feature of the body’s metabolism is the almost exclusive use of exergonic reactions by the body.
What does CH4 mean?
There is one carbon and four hydrogen atoms.
Select the most correct statement regarding nucleic acids
DNA is a long, double-stranded molecule made up of A, T, G, and C bases.
Select which reactions will usually be irreversible regarding chemical equilibrium in living systems.
glucose to CO2 and H2O
________ is fat soluble, produced in the skin on exposure to UV radiation, and necessary for normal bone growth and function.
Vitamin D
Carbohydrates are stored in the liver and muscles in the form of ________.
glycogen
What is the ratio of fatty acids to glycerol in neutral fats?
3:1
The four elements that make up about 96% of body matter are ________.
carbon (C), oxygen (O), hydrogen (H) and nitrogen (N)
Which statement about enzymes is false?
Enzymes raise the activation energy needed to start a reaction.
Choose the statement that is false or incorrect.
A key feature of the body’s metabolism is the almost exclusive use of exergonic reactions by the body.
Which of the following is an example of a suspension?
blood
Which of the following would be regarded as an organic molecule?
CH4
Which property of water is demonstrated when we sweat?
high heat of vaporization
Heat shock proteins (hsp) are a type of protein called ________.
chaperonins
An example of a coenzyme is ________.
riboflavin (vitamin B2)
A chemical reaction in which bonds are broken is usually associated with ________.
the release of energy
Which of the following is not considered a factor in influencing a reaction?
time
Which protein types are vitally important to cell function in all types of stressful circumstances?
molecular chaperones
Which statement about enzymes is false?
Enzymes raise the activation energy needed to start a reaction
Which of the following is not true of proteins?
They appear to be the molecular carriers of the coded hereditary information.
Which statement about enzymes is false?
Enzymes raise the activation energy needed to start a reaction.
Which of the following is not a role of molecular chaperonins?
act as a biological catalyst
