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Bio test review 1
MCQ's
| Question | Answer |
|---|---|
| Denature | unfolding or breaking up of a protein, modifying its standard three-dimensional structure. |
| Molecule with the same number of carbons and other atoms may behave differently if the atoms are arranged ___. | differently |
| The carbon that makes our bodies comes from plants, who get carbon from the ___, not the soil. | atmosphere |
| Hydrogen bonds are weak attractions between the oxygen of one water molecule and the hydrogen of another water molecule, and can lead to ___ between water molecules. | cohesion |
| RNA contains adenine, ___ (not thymine), guanine, and cytosine for bases. | uracil |
| In general, ___ bonds in a molecule will increase the stability of the molecule. | more |
| Dehydration synthesis involves the removal of a water molecule to make polymers out of monomers, and hydrolysis involves the ___ of a water molecule to break polymers into monomers. | addition |
| What does "lysis" mean | to cut |
| Amino acids have an amino group on one end and a carboxyl group on the other. When joined together, the amino group can bind with ___, forming a dipeptide through dehydration synthesis. | a carboxyl group from another amino acid |
| DNA is ___ stranded, where the sides run in opposite directions. | double |
| In DNA, Adenine-Thymine base pairs denature more easily than Guanine-Cytosine base pairs, since they use ___ hydrogen bonds. | less |
| Predator species are dependent on their prey. If prey populations decrease, the predator populations will ___. | decrease |
| Hydrogen bonding occurs between the hydrogen, with a positive charge, on one molecule, and a ___ charged atom in a different molecule. | negatively |
| Hydrolysis of carbohydrates involves the ___ of water to break sugar monomers. | addition |
| Remember that organisms cannot make new elements from existing elements. They may be able to break down molecules, such as breaking down glucose into smaller molecules, but they can't change a carbon atom into an ___ atom. | oxygen |
| When a protein is folded into its tertiary structure, the hydrophobic amino acids will tend to fold ___ water, and the hydrophilic amino acids will fold towards the water. | away |
| Dehydration synthesis in proteins is the ___ of water to unite amino acids. | removal |
| When two amino acids are joined together in a growing protein, a ___ bond is created between them. | special covalent bond called peptide |
| Adhesion is when water molecules, which are polar, are attracted to other molecules which are ___. | also polar |
| Polysaccharides can exist as chains or branched chains of ___ monomers. | monosaccharide |
| Dehydration synthesis of large molecules, including proteins and carbohydrates, involves the ___ of water as a byproduct. | removal |
| Proteins can be broken down into polypeptides and individual amino acids by the process of ___. | hydrolysis |
| Most sugars are lipids are made of just carbon, hydrogen, and oxygen. But the synthesis of proteins and nucleic acids require ___ also. | nitrogen |
| Surface tension is the result of ___ bonding between water molecules at the surface of a body of water. | hydrogen |
| The bases within DNA are held together by weaker ___, and can easily be disrupted with high energy exposure, such as heat or UV radiation. | hydrogen bonds |
Created by:
josie_dr
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