Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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What is the approximate diameter of double helix of DNA?
A. 2000 pm
B. 3400 pm
C. 800 pm
D. 340 pm
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- When working with the gel electrophoresis chamber, what must we keep in mind? A. Keeping the gel flat on the table without any buffer solution B. Not changing your pipette in between DNA samples C. Not shaking the chamber after the DNA has been loaded D. Loading two DNA samples per a single wellarrow_forwardIf the DNA of an organism contains 20% adenine, what is its percentage of guanine? a.20% b.60% c.80% d.30%arrow_forwardWhich enzyme adds RNA nucleotides to mark the starting point for the synthesis of a new DNA strand? A. DNA polymerase I B. DNA polymerase III C. primase D. helicase The spontaneous loss of amino groups from adenine in dna results in hypoxanthine an uncommon base opposite thymine. what combination of proteins could repair such damage? A. telomerase, primase, DNA polymerase B. nuclease, DNA polymerase, DNA ligase C. telomerase, helicase, single-strand binding protein D. DNA ligase, replication fork proteins, adenylyl cyclase A section of DNA has the following sequence of nitrogenous bases: CGATTACAG. Which of the following sequence would be produced as a result of transcription? A. CGTUUTCTG B. GCTAATGTC C. CGAUUACAG D. GUAAUGUCarrow_forward
- There is segment of double-stranded DNA that is found to have a total of 140 bases. If 45 of those bases are Thymine, how many of them are Cytosine? Group of answer choices a. 50 b. 25 c. 45 d. 90arrow_forwardSequence of nucleotides in a DNA strand is CAT TAG CAT CAT GAC, what will be the base sequence in complementary strand of RNA? A. GUA AUC GUA GUA CUG B. GTA ATC GAT GTA CTA C. TAG ATG ATG GUA CUG D. GTA ATG GTA GAT CTAarrow_forwardDuring DNA replication, what is the very first process to occur? a. synthesis of the lagging strand b. sealing of the nicks between short DNA sections c. synthesis of the leading strand d. identifying where to start or "initiate" replication e. unwinding of the parent DNAarrow_forward
- What distance separates base-pairs in the Watson-Crick model of DNA? 2.3Å O 3.4Å 4.5Å 5.6Åarrow_forwardThe following diagram shows a DNA palindrome. Supply the missing bases and use the circled base as your answer. A A G ОА OG от ос Aarrow_forwardWhich DNA fragment will be closest to the top (negative pole) of anelectrophoretic gel?a. 450 bp b. 3,560 bp c. 5 kb d. 1,500 bparrow_forward
- Which type of mechanism best repairs thymidine dimers caused by exposure to UV light? a. Nucleotide excision repair b. Base excision repair c. Mismatch repair d. NHEJarrow_forwardWhat type of interaction between the base pairs serves as the "glue" to keep the two DNA strands together? O A. hydrogen bonding B. covalent bonding O C. ion-dipole interactions D. ionic bonding O E. London dispersion forcesarrow_forwardA primer is laid down complementary to the DNA sequence TAGCAATCGCA to prime synthesis of a daughter strand. What will the sequence of the primer be? A. ATCGTTAGCGT B. ATGGTTAGGGT C. AUCGUUAGCGU D. AUCGTUAGCGTarrow_forward
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