Biological Chemistry Questions
Explore questions in the Biological Chemistry category that you can ask Spark.E!
Each amino acid has a unique _______ group. A- hydroxylB- aminoC- phosphateD- RE- carboxyl
An amino acid can be classified by the A- number of peptide bonds it can form.B- number of disulfide bridges it can form.C- characteristics of its side chains, or R groups.D- number of central carbon atoms it contains.E- number of amino groups it contains.
All amino acids have a hydrogen atom, an amino group, an R group, and a(n) _________ group.
During the formation of a peptide linkage, a(n) _______ is formed. A- hydrophilic bondB- disulfide bridgeC- ionic bondD- molecule of waterE- hydrophobic bond
Which of the following has the greatest concentration of hydrogen ions? A- Black coffee at pH 5B- Cola at pH 3C- Household ammonia at pH 11D- Baking soda at pH 9E- Human blood at pH 7
When 0.1 mole of sodium hydroxide (NaOH) is added to 1 liter of water, it ionizes, releasing OH- and Na+ ions. The resulting solution is A- neutral.B- basic.C- acidic.D- a buffer.E- molar.
A substance with a pH of 6.0 contains A- 6^10 hydrogen ions.B- 10^6 moles of hydrogen ions.C- 10^-6 moles of hydrogen ions.D- 6^10 moles of hydrogen ions.E- more OH- than H+.
he monomers that make up polymeric carbohydrates like starch are called A- fatty acids.B- nucleotides.C- nucleosides.D- monosaccharides.E- trisaccharides.
Oil and water do not mix easily because _______ cause the fat molecules of the oil to aggregate together in water. A- van der Waals forcesB- glycosidic linkagesC- ester linkagesD- covalent bondsE- disulfide bonds
What type of amino acid side chains would you expect to find on the surface of a protein embedded in a cell membrane? A- HydrophilicB- ChargedC- HydrophobicD- ShortE- Polar, but not charged
Hydrogen bonds between the amino and carboxyl groups of the polypeptide backbone help determine protein ________structure while hydrogen bonds between the amino acid side chains help determine protein ________ structure.
Choose all that apply:Protein denaturation may be caused by an increase in which of the following?A. pHB. The concentration of chaperone proteinsC. TemperatureD. Ionic concentration
Which group of molecules forms the core of all biological membranes?PhospholipidsPolynucleotidesFatsPolysaccharidesSteroids
Fats containing polyunsaturated fatty acids have ______ melting points.
A solution with pH 9 contains A- more H+ ions than OH- ions.B- no OH- ions.C- more OH- ions than H+ ions.D- only H- ions.E- the same number of OH- ions and H+ ions.
The highly branched polysaccharide that stores glucose in the muscles and the liver of animals is ____________
How do saturated and unsaturated fats differ in their ability to pack together?A. Unsaturated fats cannot pack as tightly as saturated fats because of the presence of double bonds between the carbon atoms.B. Saturated fats cannot pack as tightly as unsaturated fats because of the lack of double bonds between the carbon atoms.C. There is no difference in the ability of saturated and unsaturated fats to pack together.
Carbonic acid and sodium bicarbonate act as buffers in the blood. When a small amount of acid is added to this buffer, the H+ ions are used up as they combine with the bicarbonate ions. When this happens, the pH of the blood A- becomes acidic.C- does not change.D- ionizes.E- is reversible.F- becomes basic.
Which type of interaction plays a key role in determining both the secondary and tertiary structure of a protein?A. Hydrogen bondsB. van der Waals attractionsC. Ionic bondsD. Hydrophobic exclusionE. Disulfide bridges
Changes in a protein's shape can alter its ability to function or even cause it to become biologically _______.