Upgrade to remove ads
Terms in this set (50)
Which of the following molecules is most polar?
Methane, CO2, Methanol, Ethane, O2
(The largely electronegative oxygen causes a dipole moment and created a strong polarity within the molecule)
Which of the following properties of water is the most essential to support life?
Medium and a reactant for biochemical reactions
(Water is the most abundant compound in cells, and would be present when there are biochemical reactions happening.)
Which of the following compounds would have the greatest number of molecules in a sample of 100 grams each?
CH4, CO2, CH3OH, C2H5OH, C6H12O6
A solution contains 0.001 moles of hydroxide ions [OH-] per liter. Which of the following best describes this solution?
(pOH=-log[OH], concentration of OH is .001moles/1L. Plugging it into the equation gives you a pOH of 3. 14-3=11, which is the pH of a strongly basic solution
How will you make a 200 ml solution of 5mM sucrose from a 100mM sucrose solution?
Mix 10ml of the 100 mM sucrose and 190 ml of water
(Molarity=mol/vol(L). 10ml=.0L: 100mM=.1M.01L*.1M=.001mol .001mol/.2L=.005= 5mM of solution
Which of the following statements is (are) true about hydroxyl group?
(lone pairs on oxygen make it hydrophilic and polar)
An organic compound is considered as an alcohol if it has an _______group
Which of the these molecules can form H-bonding with a water molecule and be the most soluble two?
If 68 molecules of glucoses were covalently joined together through condensation synthesis to make a polysaccharide, how many water molecules will be released.
Consider a starch consisting of 25 glucose molecules. The complete hydrolysis of this polysaccharide would result in the production of ______
25 glucose molecules
(complete breakdown would yield the number of monomers that makeup the starch)
What are the two functional groups commonly found in all monosaccharides in their linear form?
Hydroxyl and carbonyl
Simple sugars in their ring structures will behave as ____when dissolved in water.
(polarity of hydroxyl helps is dissolve and can be seen in both linear and cyclic forms of sugars.
Which of the following molecule will have the molecular formula C12H22O11?
(2 6carbon sugars together can make this)
Which of the following element will not label polysaccharide NAM-NAG (N-acetyglucosamine (NAG) and N-acetlymuramic acid (NAM)) in bacterial cell wall?
(polysaccharides and sugars in general do not contain the element sulfur. Only proteins do. Sugars contain hydrogen, carbons and oxygens and in this particular question, nitrogen.)
Which of the following molecule will be the most amphipathic (containing both polar and non polar groups) and a major component of biological membranes?
( the phosphate is very polar and is attached to a non polar tail. It is the most abundant in cell/biological membranes.)
As the temperature decreases, the saturated fatty acid chains in the membrane lipids will relatively become ____ than unsaturated fatty acid side chains.
(saturated lipids don't have double bonds that keep the fatty acids from having stronger intermolecular interactions. As temperature decreases, they would become more solid and rigid because of less kinetic energy. Remember, temperature is directly proportional to kinetic energy. )
As the unsaturation of fatty acid increases due to fatty acid denatures activity, the melting temperature of such modified fatty acid_____
(if unsaturation increases, that means there are more double bonds. More double bonds mean the molecule has fewer interactions with other molecules. This makes it more easy to melt.
Which functional groups are common to all amino acids?
amine and carboxyl
( all amino acids have an amino, carboxyl and R-group. The R-group is the variable portion of the molecule. The other functional groups form the backbone that stays constant.
If two amino acids undergo condensation synthesis that will result in which of the following?
Water and peptide bond
( two amino acids going together forms a dipeptide and releases water through condensation synthesis)
If a mutation in the DNA resulted in changing a critical amino acid from leucine (with -CH3 in side chain) to (serine (with -OH in side chain), it will make the new amino acid to be on the _________ part of soluble protein inside cytoplasm.
(polar molecules will be on the outside that faces the aqueous environment.)
What will the interactions between the side chains of leucine and isoleucine (both contain only -CH3 in side chain) within a protein surrounded by aqueous solution?
( hydrophobic interactions are the primary form of intermolecular interaction between non polar molecules. Leu and Lie are non polar. )
What will be the highest level of protein 3-D structure in a single protein such as lysozyme?
( made of one or more secondary structures and the interactions btwn the side chains. Ex disulfide bridges, hydrogen bonds, covalent bonds. )
Ribonuclease A (RNase A) contains 4 disulfide (-S-S-) bonds making it stable.
How many cysteine residues with -SH groups should be in this RNase A?
A beta pleated cheer is an example of ____ structure of a protein.
ester linkages are formed between which two functional groups?
carboxyl and hydroxyl
Which of the following structure is stabilized by H-bonds?
Complementary base pairing of RNA strand
(The two strands need to be able to separate, so H-bonds hold them together while also allowing them to easily separate.)
Which of the following, if changed significantly, would affect all the others
(DNA is the template for RNA so any changes would affect any RNA and thus proteins formed.)
Which of the following is not true of DNA double helix molecule?
DNA contains ribose and deoxyribose in opposite strands.
(Both strands have only deoxyribose sugar. Only RNA has ribose.)
Which of the following refers to the 5' and 3' of a DNA strand respectively?
The 5th carbon and third carbon of the deoxyribose
(The deoxyribose is composed of carbons that are identified numerically. The 1' carbon is the one attached to the nucleotide and it follows the order clockwise.)
The following DNA sequences were obtained from three DNA fragments of same DNA sample, which overlap each other in terms of their sequence. The 5' refers to start and the 3' refers to end of the DNA strand.
5'- AGATCGATTGTCCGGATCG -3'
The overlapping sequences indicate the order of the fragments.
What will be the minimum length (in base pairs) of a gene that can encode a protein of 100 amino acids in the coding segment of this gene?
Which part of the atom is a measure of pH?
Which of the following molecules is not hydrophobic?
List the order of the bonds that will break while cooking a steak.
2) Ionic Bonds
3) Covalent Bonds
4) Hydrophobic interactions
5) van der Waals forces
How many mL of a 0.5M stock solution would you need to prepare 50 mL of a 100 mM NaCl solution?
A student wishes to prepare 100 mL of 0.5 M glucose (MW 180 Da). How many grams of glucose are needed?
When water freezes to form ice, the ___________ connect the water molecules.
Rank the following functional groups from most to least polar:
3, 4, 2, 1
Which of the following functional groups will decrease the [H+]?
Which two functional groups are necessary to form a zwitterion and act as a buffer?
A) Hydroxyl and Carboxyl
B) Amino and carboxyl
C) Amino and carbonyl
D) Hydroxyl and carbonyl
E) Phosphate and sulfhydryl
Amino and carboxyl
Which of the following functional groups are non-polar and hence hydrophobic?
4 only (methyl)
Larger molecules are made up of smaller units called ________ and are created through a process called ________ synthesis.
If a polysaccahride is broken into 35 individual glucose molecules by hydrolysis, how many water molecules were used in the process?
A beta pleated sheet is an example of _____________ structure of a protein.
Below is an example of a ________, and it is __________.
diglyceride, hydrophobic (134)
The major backbone of steriods is made of _______ fused C-rings.
Peptide bonds are formed between which two functional groups?
carboxyl and amino
Ester linkages are formed between which two functional groups?
carboxyl and hydroxyl
When phospholipids are placed in organic solvent, they form a ring known as a ______.
B) reverse micelle
DNA is different from RNA because it contains _______________ which is not present in RNA.
YOU MIGHT ALSO LIKE...
Possible Exam 1 Questions
Biology in Focus Chapter 3
OTHER SETS BY THIS CREATOR
GEO QUIZ 1