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BIO 151 Exam 2 Study Guide (Ch. 36) Questions And Answers

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Define osmosis and water potential. Explain how water potential is measured. - ANS Osmosis = diffusion of water through a selectively permeable membrane Water potential: a measurement that combines the effects of solute concentration and pressure. • Water potential determines the direction of movement of water. • Water flows from regions of higher water potential to regions of lower water potential. • Potential refers to water's capacity to perform work. Measured in mega...

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Bio 151 exam 2, Seth Blair, 2025-2026 Questions And Answers

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Alternate splicing does which of the following - ANS Allows partly different proteins to be translated from a single transcript In analyzing the number of different bases in a single-stranded messenger RNA, which rule is correct A + U = G + C A + T = C + U None of the other answers are correct. A = G - ANS None of the other answers are correct The role of snRNA is to - ANS help splice out introns from DNA Why does DNA replication require the enzyme primase -...

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Bio 151, Exam 2 Big Concepts, Yahn&Blair, UW Madison, 2025

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Gene Expression - ANS controlling what proteins to make or skip Prokaryotic gene expression - ANS should we make mRNA or not(simple) Eukaryotic gene expression - ANS many steps to control; transcribe rna; exit nucleus; transport mRNA to ribosome; etc. Promoter - ANS specific nucleotides that are recognized and bound by proteins transcription factors - ANS Collection of proteins that mediate the binding of RNA polymerase and the initiation of tr...

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Bio 151 exam 2, Seth Blair, 2025 Questions And Answers

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natural selection - ANS A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits. cell doctrine - ANS All living things are composed of cells A single cell is the smallest unit that exhibits all of the characteristics of life All cells come only from preexisting cells primary protein sequence - ANS the linear sequence of amino acids nucleic acid sequence - ANS ...

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EXAM 2 (bio 151) Questions And Answers

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Tetrahymena is a genus of free-living ciliates that are common in freshwater ponds. They are model organisms used to study a variety of cellular processes, including plasma membrane fluidity. Tetrahymena can maintain homeostasis by altering the fatty acid composition of their cellular membranes. You grow Tetrahymena in normal temperatures and then expose these Tetrahymena to cold temperatures. Which of the following changes in plasma membrane composition are likely to occur? I. An increase i...

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Bio 151 Exam 2 Practice test Questions And Answers

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1. Why are viruses referred to as obligate parasites? A. They cannot reproduce outside of a host cell. B. Viral DNA always inserts itself into host DNA. C. They invariably kill any cell they infect. D. They can incorporate nucleic acids from other viruses. E. They must use enzymes encoded by the virus itself. - ANS A 2. What is the name given to viruses that are single-stranded RNA that acts as a template for DNA synthesis? A. retroviruses B. proviruses C. viroids D. bacteri...

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Professor Caleb Rounds Bio 151 Exam 2 100% Correct !!!

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what happens in G1 - ANS growth of the cell what happens in G0 - ANS cell exits to this stage when it will not divide what happens in G2 - ANS checks DNA replication, finishes growing, protein replication and most amount of DNA what happens in S - ANS DNA replication what happens in M - ANS Division what is CDK - ANS cyclin dependent kinase used to regulate cell cycle what is cyclin - ANS protein. binds to CDK, helps regul...

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Bio 151 Exam 2 Questions And Answers

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light microscope (LM) - ANS Visibke light is passed through a speciman and then through glass lenses Magnification - ANS The ratio of an objects image size to its real size Resolution - ANS The measure of the clarity of the image, or the minimum distance of two distinguishable points Contrast - ANS Visible differences in brightness between parts of the sample electron microscope (EM) - ANS Used to study sub cellular structures Scanning elect...

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Bio 151 Exam 2 NKU Questions And Answers

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General features of fungi - ANS -Heterotrophic -polysaccharide cell walls with chitin -external digestion -hyphae -some are unicellular (yeast) Hyphae - ANS each of the branching filaments that make up the mycelium of a fungus. Mycelium - ANS mass of hyphae Chytridiomycota - ANS -aquatic, flagellated fungi -sexual gametes and asexual spores are motile fungal asexual reproduction - ANS spores are formed through budding or mitosis; conidia o...

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Bio 151 Exam 2 Questions And Answers

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Traits aren't transmitted in inheritance, but rather genes are - ANS Mendel's Key Discovery particular combination of alleles present - ANS genotype The expression of the traits in the individual - ANS phenotype any cross of an unknown genotype with a homozygous recessive genotype - ANS testcross the phenotype of heterozygous genotype is intermediate between the homozygous genotypes - ANS incomplete dominance This states that segregati...

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