Bio L112 Exam 3 Practice, Exam 4 review, L112 Final Exam Review, BIOL-L 112 Final Exam with verified answers

Bio L112 Exam 3 Practice, Exam 4
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review, L112 Final Exam Review, BIOL- 5 5 5 5 5




L 112 Final Exam with verified answers
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A polyribosome is - Correct answer ✔a mRNA molecule that is bound to
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many ribosomes in the act of translation
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The place where RNA polymerase first associates with DNA so that
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transcription can begin is called the __________ and is located ____________
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of the transcribed region - Correct answer ✔promoter; upstream
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Which of the following add individual nucleotides to the 3' end of an existing
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strand to build a new DNA strand during replication - Correct answer ✔DNA
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polymerase



Picture of a big balloon thing wrapped around a section of DNA, what's the
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big balloon thing? - Correct answer ✔a RNA polymerase
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Translation ends when a stop codon is at the _____ site, allowing a ________
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to bind there - Correct answer ✔A; release factor
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DNA replication must start at a replication origin. In eukaryotes that DNA
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molecule that makes up a chromosome is typically __________ and usually
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has _________ replication origin. - Correct answer ✔linear, more than one
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,The start codon translation direction incorporation of which amino acid? -
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Correct answer ✔methionine5 5




Which of the following can be safely used in a vaccine? - Correct answer ✔a
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killed pathogen AND a weakened live pathogen
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The central dogma describes the flow of information in eukaryotic gene
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expression as - Correct answer ✔DNA ----> RNA ----> protein
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Reiji Okazaki discovered what are now called Okazaki fragment which are
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produced during DNA replication. These are - Correct answer ✔short length
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of new DNA on the lagging strand
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DNA replication is said to be semiconservative because - Correct answer
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✔each new DNA molecule is composed of one old strand and one new strand
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The TATA box is a key element of the _______ of most eukaryotic protein-
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coding genes - Correct answer ✔promoter
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Which of the following nucleotide sequences represents the complementary
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sequence that would bind to the DNA strand 5' GACGTT 3'? - Correct answer
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✔3' CTGCAA 5'
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Autoimmune diseases result from a breakdown in the ability of the body to -
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Correct answer ✔distinguish self from non-self proteins
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,At the start of translation the initiator tRNA is base-paired with the start
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codon at _______ in the ribosome. - Correct answer ✔the P site (peptidyl site)
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Adjacent nucleotides on a strand of DNA are connected to each other by -
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Correct answer ✔phosphodiester bonds
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The antigen binding site is? - Correct answer ✔#1 the space where heavy and
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light chains are parallel but stop
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When a gene transcription occurs in eukaryotes, which of the following event
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is first produced? - Correct answer ✔pre-mRNA
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The following are true of eukaryotic replication EXCEPT - Correct answer
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✔extension occurs at the 5' end 5 5 5 5 5




What is the purpose of a vaccine? it is to: - Correct answer ✔stimulate the
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immune response and cause memory cells to be formed
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How many different kinds of RNA codons are there in eukaryotes? - Correct
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answer ✔64 5




Telomere characteristics include the following EXCEPT - Correct answer
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✔increase with senescence (aging) 5 5 5

, The process of removing introns from pre-mRNA and splicing the remaining
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exons together occurs in a complex called the ____________ - Correct answer
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✔signal sequence 5




Mother's milk is considered highly beneficial to infant immunity because if
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contains an antibody. This antibody is called an _________, is found in
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mother's milk and in the ____________ - Correct answer ✔IgA, saliva
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Coding strand: 5' GCATTACCA 3'. which of the following sequence is the
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correct transcript from that region? - Correct answer ✔5' GCAUUACCA 3'
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All of the following are innate defense mechanisms EXCEPT - Correct answer
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✔antibodies
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Prior to the 1940s, many biologists thought that_____________, being made
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up of 20 types of ________, was the best candidate fro genetic material -
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Correct answer ✔protein; amino acids
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As a student in this course you learned that this particular antibody is
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considered 'bad' when present at elevated levels. However there is an
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advantage to its presence. What can this antibody do that other classes of
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antibodies are unable to do? - Correct answer ✔it kills parasitc worms
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Which of the following carries amino acids to ribosomes, where amino acids
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are linked into the primary structure of a polypeptide? - Correct answer
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✔tRNA