Genetics Module 2 Exam With Questions and Answers 100% Solved

Genetics Module 2 Exam With Questions and Answers 100% Solved What are the four nucleotides that make up RNA? - answerAdenine, Guanine, Cytosine, Uracil What three general characteristics must the genetic material possess? - answerGenetic material must: 1. Contain complex information 2. Replicate faithfully 3. Encode the phenotype A segment of DNA from Drosophila melanogaster has the sequence: 5' TCA AGC TTA AGA AGG CAT TTT 3' (i) Assuming that this is the template strand, what is the sequence of the encoded mRNA (make sure to denote 5' and 3' ends of the transcript)? - answer3' AGU UCG AAU UCU UCC GUA AAA 5' -or- 5' AAA AUG CCU UCU UAA GCU UGA 3' In eukaryotes, genes for rRNA and tRNA are usually present within tandem repeats (T/F) - answerTrue Transcription and translation take place simultaneously in bacterial cells (T/F) - answerTrue In all organisms, all genes are transcribed from the same strand (T/F) - answerFalse Ribose sugars have a hydroxyl on the 2' carbon (T/F) - answerTrue A-, B-, and Z-form DNA are all right-handed helixes (T/F) - answerFalse RNA has a five-carbon sugar and DNA has a five-carbon sugar (T/F) - answerTrue RNA differs from DNA in that it: - answerHas uracil rather than thymine, is usually single- stranded rather than double-stranded, has ribose sugars rather than deoxyribose sugars What is the function of peptidyl transferase activity? - answerIt forms peptide bonds Which of the following statements is NOT true about enhancers? a) Enhancers are recognized by and bind directly to RNA polymerase. b) Enhancers can differ for each gene in a eukaryotic cell (although overlap is possible). c) Enhancers can be located thousands of nucleotides upstream of downstream of the gene they affect. d) Enhancers represent control elements located far away from the promoter. e) Enhancers contain sequences that are recognized by transcription factors. - answerA To translate a mRNA you require two other RNAs. These are: - answertRNA and rRNA What enzyme is exploited to produce synthetic mRNA - answerpolynucleotide phosphorylase The role of tRNA is - answerTo act as transporters bringing amino acids to the site of protein synthesis What is a gene? - answerA sequence of DNA that encodes a protein In the late 1950s, Meselson and Stahl grew bacteria in a medium containing "heavy" nitrogen (15N) and then transferred them to a medium containing 14N. Which of the results in the above figure would be expected after one round of DNA replication in the presence of 14N? - answerTube D (14N-15N hybrid DNA) When this molecule is synthesized, both strands of a DNA molecule are used as a template - answerDNA only This molecule is synthesized using nucleotides containing the bases adenine, guanine, cytosine, and uracil. - answerRNA only In DNA replication, the lagging strand is - answerThe strand which must be replicated in a direction away from the replication fork Heterochromatin is characterized by all of the following EXCEPT that it a) is present all over the inactive X chro