Semester_One_Final_Examinations_2022_BIOL1020

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The University of Queensland *

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1020

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Biology

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May 20, 2024

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Preview Test: BIOL1020 Semester One End-of-semester Examination 2022 Test Information Description Undertaking this online examination deems your commitment to UQ’s academic integrity pledge as summarised in the following declaration: "I certify that I have completed this examination in an honest, fair and trustworthy manner, that my submitted answers are entirely my own work, and that I have neither given nor received any unauthorised assistance on this examination". Instructions You need to answer all of the questions in the Blackboard Test. You must do all your working in the Blackboard test Don't forget to set a timer or alarm to remind you to submit your exam after 100 minutes. A reminder that if you commence the exam later than the start time - you have less time to complete the exam. You are required to type your response. If you believe there is missing or incorrect information impacting your ability to answer any particular question, please state this when answering that question. If you have issues uploading please make sure you take progressive screenshots as proof of your issues and also contact the Library AskUs service - see Examination Information for details. If you submit your online exam after the end of your specified planning time, duration, and 15 minutes submission time, the following penalties will be applied to the total mark available for the assessment: Less than 5 minutes – 5% penalty From 5 minutes to less than 15 minutes – 20% penalty More than 15 minutes – 100% penalty These penalties will be applied to all online exams unless there is sufficient evidence of problems with the system and/or process that were beyond your control. Multiple Attempts Force Completion Not allowed. This test can only be taken once. This test can be saved and resumed later. Your answers are saved automatically.
QUESTION 2 2 points Save Answer A polysaccharide containing β(1→ 4) linkages A. is unable to be digested by mammals B. cannot be found in the cellular components of plant cells C. contains a complex branching 3D structure D. has a higher glycaemic index (GI) than starch E. is structurally more rigid than a polysaccharide containing a (1→ 4) linkages Which of the following statements BEST DESCRIBE the difference between triacylglycerol (TAG) and phospholipids? A. TAG is an example of an unsaturated fat, whereas phospholipids are an example of saturated fat B. TAG is used for fat storage whereas phospholipids are used to generate amphipathic cell membranes C. TAG is an example of a trans fat, whereas phospholipids are an example of a cis fat D. TAG is found in adipocytes whereas phospholipids are not. E. TAG is comprised of a glycerol headgroup attached to three fatty acid tails, whereas phospholipids are only comprised of a phosphocholine headgroup QUESTION 1 2 points Save Answer
QUESTION 4 2 points Save Answer Which of the following statements BEST DESCRIBES the main findings of the Meselson-Stahl experiment? A. Using 14 N in experiments is an effective way of tracking nitrogen molecules B. The semiconservative model of DNA replication is more accurate than the dispersive or conservative models of DNA replication C. DNA can be separated using centrifugation D. Both strands of each new DNA double helix are brand new and synthesized from individual nucleotides E. Bacteria grown in the presence of a heavier nitrogen isotope ( 15 N) will replicate at a slower rate than those that utilise a lighter nitrogen isotope ( 14 N) Which of the following statements is TRUE? A. In prokaryotic cells the DNA is dispersed randomly throughout the cell B. Prokaryotic cells have mitochondria, except Archaea C. The main difference between eukaryotes and prokaryotes is the presence of ribosomes D. Chloroplasts can be found in multicellular and single cell organisms E. Eukaryotic cells have a triple membrane surrounding the nucleus QUESTION 3 2 points Save Answer
QUESTION 6 2 points Save Answer In an anabolic reaction A. biological molecules are broken down and the Gibbs free energy increases. B. biological molecules are broken down and the Gibbs free energy decreases. C. biological molecules are synthesised and the Gibbs free energy is invariant. D. biological molecules are synthesised and the Gibbs free energy increases. E. biological molecules are synthesised and the Gibbs free energy decreases. Which of the following statements is MOST ACCURATE? A. The reduction of NADH in the mitochondrial matrix results in the transfer of 2 electrons to the electron transport chain. B. The reduction of NADH in the mitochondrial matrix results in the transfer of 1 electron to the electron transport chain. C. The oxidation of NADH in the mitochondrial matrix results in the transfer of 1 electron to the electron transport chain. D. The oxidation of NADH in the mitochondrial matrix results in the transfer of 2 electrons to the electron transport chain. E. The oxidation of NADH in the cytoplasm results in the transfer of 1 electron to the electron transport chain. QUESTION 5 2 points Save Answer
QUESTION 8 2 points Save Answer QUESTION 9 2 points Save Answer Which of the following statements is FALSE? A. In telophase two nuclear envelopes are fully formed and the cell splits in two via cytokinesis. B. In the prophase chromatin condenses into X- shaped chromosomes. C. The contraction of the kinetochore microtubules leads to the separation of the sister chromatids during anaphase. D. In the eukaryotic cell cycle the cell spends much more time in the interphase than in the mitotic phase. E. Centrosomes are anchor points for microtubules and are essential to form the mitotic spindle. Which one of the following statements about the p53 tumour suppressor is CORRECT? A. More than 50% of all cancer patients have a mutated p53 gene. B. p53 is inactivated by kinases. C. In the presence of active p53 only mutated DNA will be able to be replicated in the S phase. D. p53 promotes transcription in cells that have not yet been exposed to UV light. E. p53 prevents UV light-induced DNA mutations. A(n) may be homozygous or heterozygous, whereas a(n) may be described as dominant or recessive A. genotype, phenotype B. gene, allele C. gene, trait D. allele, gene E. phenotype, genotype QUESTION 7 2 points Save Answer
QUESTION 11 2 points Save Answer QUESTION 12 2 points Save Answer How is the expression of genes controlled at the chromosomal level? A. DNA can be unwound into euchromatin to reduce the level of expression B. DNA is spontaneously deleted from a chromosome if not needed C. DNA can synthesize extra histones as needed D. The expression of DNA can only be controlled at the transcriptional level E. DNA can either be condensed into heterochromatin or decondensed into euchromatin Mutation of which of these sequences would have an effect on translational initiation? A. upstream enhancer B. Polyadenylation signal C. 5’ UTR D. 3’ UTR E. TATA box Which of the following is NOT found in a prokaryotic genome? A. All of these are found in a prokaryotic genome B. tRNA genes C. Enhancers D. Histone genes E. Operons QUESTION 10 2 points Save Answer
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