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BIO 1500 FINAL EXAM NEWEST 2025 TEST BANK|
COMPLETE 200 REAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+| BIO 1500 EXAM
REVIEW 2025 (BRAND NEW!!)
Which of the following components is required for DNA replication?ribosomes transfer RNA RNA primer proteases sucrases - ANSWER - RNA primer
The removal of the RNA primer and addition of DNA nucleotides to the 3' end of Okazaki fragments in its place is carried out by _____. - ANSWER - DNA polymerase I
The unwinding of DNA at the replication fork causes twisting and strain in the DNA ahead of the fork, which is relieved by an enzyme called _____. - ANSWER - topoisomerase
Once the DNA at the replication fork is unwound by helicases, what prevents the two strands from coming back together to re-form a double helix? - ANSWER - Single-strand binding proteins bind the unwound DNA and prevent the double helix from re-forming.
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pg. 2 The atmosphere of the early Earth did not contain O2. Where did the O2 eventually come from? - ANSWER - Photosynthetic organisms released the O2.
Danielle, a student in Bio1500, worked very hard on the lab and has a Lab average of 100%. Because she skipped several discussions without excuses, her average in the discussion is 75%. What is the combined Lab*Discussion score which counts for 25% of the total Bio1500 grade?
- ANSWER - 75%, because the two grades are multiplied with each
other
The atmosphere of the early earth lacked molecular oxygen. If O2 had never been added to the atmosphere, what geological phenomenon would not have occurred? - ANSWER - Most minerals wouldn't exist
Why do cells perform photosynthesis? - ANSWER - to make carbohydrates
Bacteria use restriction enzymes to _____. - ANSWER - destroy foreign DNA
An enzyme that cuts DNA at a symmetrical sequence of bases is called _____. - ANSWER - a restriction enzyme
When a typical restriction enzyme cuts a DNA molecule, the cuts are staggered so that the DNA fragments have single-stranded ends. This is important in recombinant DNA work because _____. - ANSWER - the 2 / 4
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pg. 3 fragments will bond to other fragments with complementary single- stranded ends
In genetic engineering, "sticky end" refers to _____. - ANSWER - short bits of single-stranded DNA left at the end of DNA molecules cut by restriction enzymes
What two enzymes are needed to produce recombinant DNA? - ANSWER - a restriction enzyme and a ligase
In the polymerase chain reaction (PCR), the sequence of bases in the primers is important because it _____. - ANSWER - determines which segment of the genome will be amplified
A molecular biologist has isolated a short segment of DNA that she wants to replicate in vitro. First she heats the DNA, which separates the two strands, and then she adds _____. - ANSWER - nucleotides, primers, and polymerase
In the polymerase chain reaction (PCR) technique, a heating phase and a cooling phase alternate. An original sample of DNA would have to pass through how many total rounds of heating and cooling before a sample is increased eight times in quantity? - ANSWER – three
Which of the following is NOT a similarity between Photosynthesis and Cellular Respiration? - ANSWER - Both have water as a by-product
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pg. 4 The building blocks of lipids are ____ , while proteins are made up of ____ - ANSWER - fatty acids amino acids
When you shine a white light on the chlorophyll extract, the chlorophyll appears to be red. Why? - ANSWER - Electrons in the chlorophyll absorb light energy and then re-emit the energy as red light.
A scientist working for a corn farm measures the relative amount of red fluorescence coming from the leaves of the corn plants over time. One day, they found a field where the red fluorescence was unusually high.What conclusion did the scientist most likely draw? - ANSWER - The plants were not performing photosynthesis efficiently, as much of the energy harvested from the sunlight was not passed on to the ETC.
Suppose there is a 'leak' in the inner mitochondrial membrane, allowing protons that have been pumped across the membrane to leak back through to the other side. Which of the following would be the most likely outcome of such a situation? - ANSWER - A reduction in ATP production
A molecule of glucose has just undergone glycolysis in one of your brain cells. What will happen next? - ANSWER - Pyruvate will be prepped to undergo the citric acid cycle.
Puncture wounds, such as those obtained by stepping on nails, are particularly susceptible to infections by the bacteria that cause tetanus.These bacteria can only survive in environments in which there is very
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