The six elements that make up 99.9% of all living things include 1.C, K, O, N, Ca and S 2.C, P, S, H, O and N 3.C, P, K, I, O and N 4.N, O, P, H, S and T

Which chemical elements would you expect to find in abundance in a living cell? 1.hydrogen, neon, argon 2.carbon, oxygen, hydrogen 3.iron, magnesium, calcium 4.sodium, potassium, sulfur

What are the building blocks of protein molecules? 1. Polymers 2.fatty acids 3.glucose molecules 4.amino acids

Fats are important energy storage compounds because they: 1. readily breakdown to form glucose 2. provide immediate energy 3.contain more energy per gram than carbohydrates or proteins 4.are liquid at normal body temperatures 5.don't require nitrogen

Which of the following describes the function of proteins? 1.energy formation and storage 2.energy used in muscles and reaction 3.structural use and enzyme formation 4.heredity and genetic code carriers

What is the most common food storage compound in plants? 1.Glucose 2.Starch 3.Sucrose 4.Cellulose 5.fat

The properties of water make it very valuable to living systems. Which of the following statements regarding water is not true? 1.it modifies temperature extremes 2.it makes up about 50% of your body 3.it is the greatest solvent in the world 4.it expands slightly when it freezes 5.it covers more than 75% of the earth's surface

Which of the following statements are true of enzymes? 1.they are lipids 2.they will react with most body chemicals 3.they can only be used once 4.they usually slow down reactions and prevent overheating of the cells 5.they usually speed up chemical reactions

Which characteristic of water allows it to support the weight of objects more dense than water? 1.capillary action 2.surface tension 3.specific heat 4.Evaporation 5.adhesion

Water is polar in nature. To be polar means to: 1.be very cold and difficult to warm up. 2.freeze easily and boil rapidly 3.have positive and negative charged ends 4.have a low heat capacity

Which one of the following is not an organic molecule found in living organisms? 1.Protein 2.Nucleic acid 3.Carbohydrate 4.Sodium chloride 5.Lipid

Which combination of particle and charge is correct? 1.Proton:positively charged 2.Electron:positively charged 3.Neutron: negatively charged 4.Proton: negatively charged

Which of the following molecules is made up of glycerol and fatty acids? 1.Sugars 2.Starches 3.Lipids 4.Nucleic acids 5.proteins

An acidic solution could have a pH of

The three particles in an atom are 1.Protrons, neutrons, ions 2.Protons, neutrons, electrons 3.Proteins, lipids, carbohydrates 4.Isotopes, electrons, neutrons

Which of the following is a positive test for starch? 1.Benedicts solution turns orange 2.Iodine turns yellow 3.Iodine turns black 4.Biuret turns violet

Which of the following is a positive test for a simple sugar? 1.Sudan IV powder dissolves coloring the solution red 2.Biuret turns blue 3.Iodine turns black 4.Benedicts turns red

When salt is dissolved in water, the water is the 1.Reactant 2.Solution 3.Solute 4.Solvent

A substance with a pH of 8 is 1.An acid 2.A base 3.Both an acid and a base 4.neutral

How much more acidic is a substance with a pH of 4 compared to a substance with a pH of 6? 1.10 times 2.20 times times times

Which of the following is an example of a catalyst? 1.An enzyme 2.Sodium Chloride 3.Water 4.Carbon Dioxide