Class quizzes Flashcards
Which of the following binds with the nucleotide base termed A?
A. G
B. T
C. None
B. T
Which of the following would be a strong electrolyte? A. H2 B. C6H6 C. NaBr D. CH3Cl
C. NaBr
During intron splicing which of the follow is true?
A. The 3’ splice site is cleaved first then the 5’ splice site is cleaved
B. The 5’ splice site is cleave and intron splicing is complete
C. Small ribonuclearproteins bind on the 3’splice site and a lariat loop structure is formed
D. Small ribonuclearproteins bind on the 5’splice site and a lariat loop structure is formed
D. Small ribonuclearproteins bind on the 5’splice site and a lariat loop structure is formed
When 5’-ATGCGTTAG-3’ is transcribed the product is A. 3’-TACGCAATC-5’ B. 5’-TACGCAATC-3’ C. 5’-UACGCAAUC-3’ D. 3’-UACGCAAUC-5’
D. 3’-UACGCAAUC-5’
The reason introns must be removed from the tRNA is because
A. Introns form in the P arm and will change the structure of the tRNA
B. Introns form in the acceptor arm and will change the structure of the tRNA
C. Introns form in the D arm and will change the structure of the tRNA
D. Introns form in the anticodon arm and will change the structure of the tRNA
D. Introns form in the anticodon arm and will change the structure of the tRNA
An unknown species of bacteria was analyzed and its genome was sequenced. Its full genomic sequence was determined to have 15% A and 35% G. Given this information, what is true about the organism’s genome? A. The organism most likely has 35 % C B. The organism most likely has 85 % T C. none D. The organism most likely has 65 % C
A. The organism most likely has 35 % C
Which molecule would have the strongest tendency to form hydrogen bonds with other identical molecules? A. C2H6 B. CH4 C. NH3 D. H2
C. NH3
On a nucleotide the nitrogenous base is connected to the ribose sugar by which type of bond A. Hydrogen bond B. Glycosidic bond C. Ionic bond D. Peptide bond
B. Glycosidic bond
Hydrogen chloride (HCl) is a strong acid that will __________ when placed in water.
A. Leave some molecules of HCl behind and break off into H+ and Cl-
B. Partially dissociate
C. Be concerned that we are concerned about this question
D. Completely dissociate
D. Completely dissociate
Which of the following is a nonpolar amino acid? A. Leu B. None C. Cys D. Trp
A. Leu
Which of the following binds with the nucleotide base termed C? A. A B. U C. T D. G
D. G
When 5’-ATGCGTTAG-3’ is replicated the product is A. 3’-TACGCAATC-5’ B. 5’-UACGCAAUC-3’ C. 5’-TACGCAATC-3’ D. 3’-UACGCAAUC-5’
A. 3’-TACGCAATC-5’
The region of DNA where transcription is initiated is the A. Hairpin site B. Rho binding site C. Polly A tail D. Promotor binding site
D. Promotor binding site
All of the following except which are domains in the three domain tree of life. A. Bacteria B. Eukaryotes C. m. Euglena D. Archaea
C. m. Euglena
Amino acids can be all but which of the following? A. Nonpolar B. Ionic C. Polar D. Charged
B. Ionic
In replication, on the strand of DNA that is not continuously replicated
A. Is called the leading strand
B. Single stranded binding proteins do not bind
C. Is called the replication bubble
D. Fragments called Okazaki fragments are synthesized
D. Fragments called Okazaki fragments are synthesized
Which of the following binds with the nucleotide base termed T? A. C B. A C. None D. G
B. A
The following are types of intermolecular forces except A. Dipole-dipole forces B. Hydrogen bonding C. Helium bonding D. Ion-dipole forces
C. Helium bonding
Tertiary protein structure is determined by all of the following except A. Disulfide bonding B. Hydrophobic interactions C. Hydrogen bonding D. Phosphodiester bonding
D. Phosphodiester bonding
The majority of our ATP is made in the A. Endoplasmic Reticulum B. Lysosome C. Nucleus D. Mitochondria
D. Mitochondria
The amino acids are connected together by \_\_\_\_\_\_\_\_ to produce the primary proteins structure. A. Peptide bonds B. Hydrogen bonds C. Glycosidic bonds D. Carbon bonds
A. Peptide bonds
A silencer will A. Decrease transcription B. None C. Stimulate more replication bubbles D. Increase transcription
A. Decrease transcription
Which of the following is a polar amino acid? A. Val
B. Ser
C. Ile
D. Phe
B. Ser
The backbone of the DNA molecule is held together by which type of bond A. Phosphodiester bond B. Hydrogen bond C. Glycosidic bond D. Peptide bond
A. Phosphodiester bond
An enhancer will A. Increase transcription B. None C. Inhibit RNA polymerase binding D. Decrease transcription
A. Increase transcription
How many water molecules would be produced by connecting six individual amino acids to form a hexapeptide? A. 7 B. 6 C. 5 D. 3
C. 5
A buffer will \_\_\_\_\_ a pH change when an acid or base is added. A. Resist B. Decrease C. Encourage D. Increase
A. Resist
Which is the smallest of the 20 biologically active amino acids? A. Ala B. Phe C. Gly D. Lys
C. Gly
A strong electrolyte will A. Remain intact B. Cause itching C. Partially dissociate D. Dissociate completely
D. Dissociate completely
All are types of RNA except for which A. Lysosomal RNA B. Ribosomal RNA C. Transfer RNA D. Messenger RNA
A. Lysosomal RNA
Which is true about replication
A. There is only one point of replication initiation in eukaryotes
B. The leading strand is synthesized in a continuous fashion and the lagging strand is not
C. Topoisomerase unwinds the DNA
D. Primases lay down primers on the leading strand
B. The leading strand is synthesized in a continuous fashion and the lagging strand is not
A nucleotide is composed of all except A. Nitrogenous base B. Carboxyl group C. Phosphate group D. Ribose sugar
B. Carboxyl group
With respect to B-DNA the A-DNA will have
A. Less base pairs per turn because it’s squished relative to the B-DNA
B. Less base pairs per turn because it’s stretched relative to the B-DNA
C. More base pairs per turn because it’s squished relative to the B-DNA
D. More base pairs per turn because it’s stretched relative to the B-DNA
C. More base pairs per turn because it’s squished relative to the B-DNA
Which species of RNA is responsible for the transport of individual amino acids during protein synthesis? A. mRNA B. rRNA C. tRNA D. qRNA
C. tRNA
Two strands of DNA are held together by which type of force A. Peptide bond B. Hydrogen bond C. Glycosidic bond D. Phosphodiester bond
B. Hydrogen bond
DNA can be methylated anywhere but to affect gene transcription there are more methylation sites on the A. Polly A tail B. Gene C. Start codon D. Promoter
D. Promoter
The cellular compartment that moves completed proteins and lipids around in the cell is A. Rough endoplasmic reticulum B. Smooth endoplasmic reticulum C. Golgi apparatus D. Nucleus
C. Golgi apparatus
The central dogma of biology is
A. RNA is transcribed to DNA which is translated to protein
B. Protein is transcribed to RNA with is translated to DNA
C. DNA is transcribed to RNA which is translated to protein
D. RNA is transcribed to DNA which is translated to protein
C. DNA is transcribed to RNA which is translated to protein
Which of the following types of DNA is the most common A. B-DNA B. A-DNA C. C-DNA D. Z-DNA
A. B-DNA
The following are unique qualities of water except
A. Solid water is more dense than liquid water
B. Polar structure
C. High specific heat
D. Weak electrolyte
A. Solid water is more dense than liquid water
The inner membrane of the mitochondria is a folded up throughout the organelle because A. It provides torsional relief so proteins moving in the membrane do not get stuck
B. It results in smaller surface area so less energy is used to synthesize the membrane
C. It provides space for proteins to dock
D. It results in a greater surface area for ATP synthesis
D. It results in a greater surface area for ATP synthesis
With respect to B-DNA the Z-DNA will have
A. Less base pairs per turn because it’s stretched relative to the B-DNA
B. More base pairs per turn because it’s squished relative to the B-DNA
C. More base pairs per turn because it’s stretched relative to the B-DNA
D. Less base pairs per turn because it’s squished relative to the B-DNA
A. Less base pairs per turn because it’s stretched relative to the B-DNA
Which of the following require additional RNA processing A. tRNA B. mRNA C. All of the above D. rRNA
C. All of the above
What is the pOH of a 0.3 M solution of NaOH? A. 0.01 B. 0.52 C. 0.99 D. 0.82
B. 0.52
Eukaryotes have a specific sequence in there promoter which is A. ATG B. Multiple adenines in a row C. A TATA box D. A -35 and -10 site
C. A TATA box
The pyrimidines are \_\_\_\_\_\_\_\_ and \_\_\_\_\_\_\_\_. A. Thymine...Cytosine B. Cytosine...Guanine C. Thymine...Adenine D. Uracil....Adenine
A. Thymine…Cytosine
The organelle that is involved in protein digestion is the A. Microtubule B. Peroxisome C. Cytosol D. Lysosome
D. Lysosome
On the pH scale a pH between 0 – 6 is _____ and a pH between 8 – 9 is _______. A. Acidic…basic
B. Basic…acidic
C. Anionic…cationic
D. Cationic…anionic
A. Acidic…basic
At which pH would a buffer with a pKa of of 4.73 work well? A. 13.2 B. 3.76 C. 7.99 D. 0.22
B. 3.76
In proteins and lipids hydrophobic parts will bind with A. DNA B. Other hydrophilic parts C. Water D. Other hydrophobic parts
D. Other hydrophobic parts
Which type of enzyme would break a six carbon molecule into two three carbon molecules? A. Hydrolase B. Ligase C. Lyase D. Isomerase
D. Isomerase
Which type of enzyme typically breaks down a disaccaride A. Ligase B. Isomerase C. Hydrolase D. Transferase
C. Hydrolase
Water soluble vitamins are less toxic than fat soluble vitamins because
A. excess of the vitamin is not stored in the body as easily as fat soluable vitamins
B. excess of the vitamin is stored in the body while fat soluable vitamins are not stored in the body
C. it’s just what they do
D. there is no possible way to have excess of a water soluable vitamin in the body
A. excess of the vitamin is not stored in the body as easily as fat soluable vitamins
If the concentration of substrate increases from 1 molar to 2 molar and the rate of the reaction increases from 1 M/s to 4 M/s what is the order of the reaction? A. Third order B. Second order C. Zero order D. First order
B. Second order
An enzyme is primarily composed of A. Sugars B. Amino acids C. Phenyl rings D. Nucleic acids
B. Amino acids
\_\_\_\_\_\_\_\_\_\_\_\_\_ enzymes do not obey Michaelis-Menton kinetics. A. Inactive B. Chiral C. Allosteric D. Hydrophobic
C. Allosteric
Cholecalciferol is which vitamin A. D2 B. B2 C. B3 D. D3
D. D3
An enzyme \_\_\_\_\_\_\_\_\_\_ a reaction rate by \_\_\_\_\_\_\_\_\_ the activation energy. A. Increases...lowering B. Lowers...lowering C. Increases...increasing D. Lowers...increasing
A. Increases…lowering
All of the following are examples of cofactors except A. Minerals B. Vitamins C. Some metals D. Glucose
D. Glucose
Which kind of enzyme would be able to regulate another enzyme through the transfer of a phosphate group? A. Regulase B. Kinase C. Protease D. None
B. Kinase
Racemase and Epimerase are in which enzyme category? A. Hydrolase B. Ligase C. Transferase D. Isomerase
D. Isomerase
Phylloquinone is which vitamin? A. D2 B. K2 C. K1 D. D1
C. K1
Tocopherols are which vitamin? A. K B. A C. B D. E
D. E
Thiamine is which vitamin? A. B2 B. B4 C. B1 D. B3
C. B1
Kinases, Aminotransferases and Acytltransferases are all types of which enzyme class? A. Hydrolases B. Transfases C. Isomerases D. Oxidoreductases
B. Transfases
Ergocalciferol is which vitamin A. B2 B. D3 C. D2 D. B3
C. D2
If a client presents with bleeding diathesis which vitamin would you recommend? A. A B. D C. E D. K
D. K
Ascorbic acid is another name for which vitamin A. K B. E C. C D. B
C. C
Which of the following statements about enzymes or their function is true
A. Enzymes are proteins whose three-dimensional form is key to their function
B. Enzymes do not alter the overall change in free energy for a reaction
C. Enzymes speed up reactions by lowering activation energy
D. All of these are true
D. All of these are true
An overdose of which vitamin can lead to muscle relaxation A. B2 B. B1 C. B4 D. B3
B. B1
Overdose of which vitamin leads to congestive heart failure? A. A B. E C. D D. K
B. E
Which type of enzyme adds a phosphate group from ATP to a molecule of fructose A. Lyase B. Transferase C. Isomerase D. Ligase
B. Transferase
Which type enzyme is responsible for joining the backbone of DNA? A. Lyase B. Ligase C. Hydrolase D. Isomerase
B. Ligase
If a client is presenting with rickets which vitamin would you recommend the client to take? A. C B. A C. B D. D
D. D
Which type of enzyme utilizes water to break bonds? A. Lyase B. Hydrolases C. Transferase D. Isomerase
B. Hydrolases
Increased absorption of calcium is linked to which vitamin? A. A B. D C. B2 D. C
B. D
Overdose of which vitamin will mask B12 deficiency? A. B7 B. B9 C. B5 D. B6
B. B9
An enzyme that catalyses the reduction of NAD+ to NADH of a substrate is which type of enzyme? A. Lyase B. Isomerase C. Oxidoreductase D. Trasferase
C. Oxidoreductase
Retinols are which type of vitamin A. Vitamin C B. Vitamin K C. Vitamin D D. Vitamin A
D. Vitamin A
All are true about ligases except A. They repair DNA breaks B. They create carbon-carbon bonds C. They add phosphate groups D. They require energy
C. They add phosphate groups
Which vitamin is a cofactor in collagen synthesis? A. A B. E C. C D. B
C. C
Question 35 Which vitamin is pantothenic acid A. B6 B. B5 C. B2 D. B3
B. B5
If a client presents with pellagra which vitamin would you recommend? A. B5 B. B2 C. B6 D. B3
D. B3
Which type of enzyme will move a double bond from one carbon to another carbon in a five carbon molecule? A. Ligase B. Lyase C. Isomerase D. Hydrolase
C. Isomerase
Oxygenases, dehydrogenases, peroxidases and hydrozylases are all examples of which type of enzyme? A. Hydrolases B. Isomerases C. Oxidoreductases D. Lyases
C. Oxidoreductases
Which vitamin enhances absorption of various metals such as, Mg, Fe and Ca? A. E B. A C. K D. D
D. D
Which type of enzyme typically breaks or forms carbon carbon bonds A. Oxidoreductases B. Hydrolase C. Isomerases D. Lyases
D. Lyases
Enzymes are able to catalyze highly specific reactions because
A. All enzymes are located on the surface of the cell membrane
B. All enzymes are proteins
C. None
D. Of the organization of their 3D structure and composition of their active sites
D. Of the organization of their 3D structure and composition of their active sites
If a patient is having vision issues, which is the best vitamin to recommend A. E B. B C. C D. A
D. A
Which vitamin is the only organometallic vitamin? A. B9 B. B12 C. B2 D. B5
B. B12
Vitamin A is a cofactor for which enzyme A. retinol oxidoreductase B. retinol lyase C. retinol dehydrogenase D. retinol kinase
C. retinol dehydrogenase
Which vitamin serves as a cofactor for flavoproteins? A. B2 B. B7 C. B3 D. B1
A. B2
The following are characteristics of enzymes except.
A. They lower the activation energy of a reaction
B. Their names end with ase
C. They act on a substrate
D. The increase activation energy of a reaction
D. The increase activation energy of a reaction
Which vitamin is riboflavin? A. B2 B. B4 C. B3 D. B7
A. B2
Which vitamin is required for synthesis of co-enzyme A? A. B5 B. B9 C. B7 D. B6
A. B5
What of the following vitamins are water soluble A. D B. C C. A D. K
B. C
