Biology Semester Exam (Review Sheet)

25 July 2022
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question
List 2 factors that can affect the rate of activity of an enzyme.
answer
The enzyme substrate complex, basic enzyme reactions
question
Construct the equation for cellular respiration.
answer
C6H12O6 + 6O2 --> 6H2O + 6CO2 + 36-38 ATP
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What is the purpose of cellular respiration?
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Cellular respiration provides the cells with energy (makes ATP)
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In what organelle does cellular respiration take place?
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Mitochondrion
question
Compare/contrast the structure of DNA and RNA
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DNA: double helix, stores genetic info, nucleus, stable, Thymine RNA: single strand, transmits genetic info, cytoplasm, temporary, Uracil
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Describe the shape/structure of DNA. Include the 3 parts of a nucleotide.
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DNA looks like a twisted ladder; sugar, phosphate, base
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What elements are found in each of the four biomolecules?
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Carbon, hydrogen, oxygen
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Which of the following is the most complex: prokaryotic or eukaryotic?
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Eukaryotic
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What is DNA fingerprinting?
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The analysis of DNA from samples of body tissues or fluids in order to identify individuals
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Describe the function of the cell membrane
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It controls what goes in and out of a cell
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Compare the size of a bacterial cell to a virus
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A bacteria cell is larger than a virus
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In a karyotype, which pair of chromosomes determines the gender of an individual?
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The 23rd pair of chromosomes
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Compare/contrast mitosis and meiosis
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Meiosis and mitosis both involve the division of cells, but meiosis does 2 rounds while, mitosis does 1. Meiosis also only involves sex cells.
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Work the following monohybrid Punnett square problem. In mice, black eyes are dominant over red eyes. A heterozygous male, black eyed mouse is crossed with a red eyed, female mouse. Predict the possible offspring.
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50% heterozygous black eyes, 50% homozygous red eyes (0:2:2)
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Work the following dihybrid cross problem. In winter squash, white color (W) is dominant over yellow fruit color. Disk-shaped fruit (D) is dominant over sphere-shaped fruit. If a squash plant true-breeding for white, disk-shaped fruit is crossed with a plant true-breeding for yellow, sphere-shaped fruit, what will the genotype and phenotypes of the offspring be for the F1 generation?
answer
100% heterozygous white, disk-shaped fruit (WwDd)
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Describe an insertion mutation
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The addition of one or more nucleotide base pairs into a DNA sequence
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Describe a deletion mutation
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A mutation in which a part of a chromosome or a sequence of DNA is lost during DNA replication
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Describe an inversion mutation
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A section of DNA is put in backwards
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What causes the genetic disorder, Down's syndrome?
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When you inherit an unbalanced translocation involving chromosome 21 that may have extra genetic material
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What is transcription?
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Strand of DNA is copied into a new molecule of messenger RNA (mRNA)
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What is translation?
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Translating the sequence of a mRNA molecule to a sequence of amino acids during protein synthesis
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Explain what happens in each phase of the cell cycle
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G1: cell growth, S: DNA is duplicated, G2: cell prepares for division, M: cell divides
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What happens when cell division is uncontrolled?
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Cancer (mutations)
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What are germ cells?
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Gametes (sex cells)
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Describe protein synthesis
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Turning DNA into usable energy
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Distinguish between active and passive transport
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Passive transport does not require energy, active transport does
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Distinguish between osmosis and diffusion
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Diffusion: the movement of any chemical from one place to another, Osmosis: movement of water across a membrane
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Write the equation for photosynthesis
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6H2O + 6CO2 --> C6H12O6 + 6O2
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What organelle does photosynthesis take place in?
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Chloroplast
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Describe DNA replication
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Transcription
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Which organelles have a double membrane?
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Mitochondria, chloroplast, E.R., golgi body, and nucleus
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Describe the function of the ribosomes
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Make protein
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Compare your DNA to your friend's DNA. What makes each of us unique?
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The sequence of our DNA
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Compare/contrast the DNA of different species
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Other species, such as monkey's have DNA very similar to ours
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Describe the difference between aerobic and anaerobic
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Aerobic means "with oxygen". Anaerobic means "without oxygen".