Atoms and Ions
An atom gains one electron. Why does it become an anion?
It now has more electrons than protons, giving it a net negative charge.
Why is water a polar molecule?
It's electrons are distributed unevenly, creating partial positive and partial negative regions.
In sugar water, what substance remains the solvent even if more sugar dissolves?
water
Which macromolecule class is commonly used as a rapid source of cellular energy?
Carbohydrates.
What are the building blocks of proteins?
What are amino acids?
When two monomers join and water is released, what process occurred?
What is Dehydration Synthesis?
Two atoms have the same number of protons but different numbers of neutrons. What are they?
Isotopes of the same element.
What molecular attraction is mainly responsible for water's strong cohesion?
Hydrogen bonds between separate water molecules.
What is difference between a solvent and a solute?
The solvent does the dissolving. the solute is dissolved.
Which carbohydrate do plants primarily use for energy storage?
Starch.
Most enzymes belong to which macromolecule class?
What is Proteins?
During hydrolysis of polymer, what happens to water?
Which subatomic particle must change to turn an atom into a different element?
The number of protons.
A water strider can remain on the surface of water because of what property?
Surface tension caused by cohesion.
A molecule readily interacts with water. What term most likely describes it?
Hydrophillic
What is Cellulose?
Why can changing a protein's shape change its function?
Protein function often depends on its three dimensional shape and what it can bind to.
Which two biological processes are opposites of each other?
What are Dehydration synthesis and hydrolysis.
Why are valence electrons especially important?
They are the outermost electrons and participate in chemical bonding.
Which water property helps organisms resist rapid changes in body temperature?
High specific heat.
What type of substance would most likely be hydrophobic?
Which carbohydrate is an important glucose storage form in animals?
What is glycogen?
What are the building blocks of DNA and RNA?
A cell joins many amino acids to make a polypeptide. Which process is repeatedly involved?
What is Dehydration synthesis?
An atom has 11 protons and 10 electrons. What is its net charge?
+1
Why does ice float on liquid water?
Solid water forms a more open structure and is less dense than liquid water.
Why do oil and water separate?
Water is polar while most oils are largely nonpolar and hydrophobic.
What components are commonly used to build a triglyceride?
What are glycerol and fatty acids?
How are DNA, RNA and proteins functionally connected?
During digestion, proteins are broken into smaller peptides and amino acids primarily by what process?