Biology question and answers for January 08, 2024
- Q Which of the following is most likely to occur if a researcher removes the 5 cap and poly A tail of an mRNA and inserts the mRNA molecule into a...
- Q Which of the following best explains the observation that in bacteria there are 61 mRNA codons that specify an amino acid but only 45 tRNAs O The DNA codes 61...
- Q stion 4x What is included in the body s nonspecific defense against invading pathogens x x A antibiotics B C D antibodies mucous sweat tears SC 912 L 14 52...
- Q Pax 6 is a gene involved in eye formation that has homologues in invertebrates and vertebrates The fact that expressing the mouse form of Pax 6 in a fruit fly...
- Q Which of the following molecules is a protein produced by a regulatory gene O operon O repressor O promoter O operator
- Q In the following symbol 12 C number 12 refers to O Atomic number which the number of protons O Atomic mass weight in Daltons Atomic Mass Units O Atomic number...
- Q Heat Temperature Internal Energy Q Kinetic energy A Amount of energy in an object due to the internal motion of the atoms and mass B A measure of the internal...
- Q O Over 1 x 1012 mass is probably made up of stars fg Over half the galaxy s mass is probably made up of gas and dust The galaxy s...
- Q Polymers of polysaccharides fats and proteins are all synthesized from monomers by O the removal of water dehydration synthesis O the addition of water dehydration synthesis O the removal of...
- Q Which of the following functional groups account for solubility of sugars in water because the atoms in the functional group molecular formula are linked via polar covalent bonds as discussed...
- Q The tertiary structure of a protein is the O twisting of a peptide chain into an alpha helix O bonding of two amino acids together to form a dipeptide O...
- Q How does an enzyme catalyze a reaction O by lowering the free energy of a reaction O by lowering activation energy O by increasing the amount of free energy O...
- Q Describe how in general the intensity of the physiological response of an in vitro assay responds to increasing agonist concentration
- Q The alpha helix and the beta pleated sheet are both common forms found in which level s of structure of proteins O secondary O tertiary O primary tertiary primary O...
- Q are negatively charged par in the orbitis around the nucleus of an alon they are what determines the Chimical properties and the type of Bond that will form A proton...
- Q Please select all true answers Rho Kinase can stimulate myosin activity by phosphorylating myosin light chain kinase Myosin V unfolds and becomes active when it binds cargo Increasing Myosin phosphatase...
- Q The term reduction refers to O a lost in electrons O a gain in neutrons O neither gain or lost in electrons O a gain in electron and protons O...
- Q G protein signaling terminated The a subunit of the heterotrimeric G protein dissociates from the B and the y subunits The a subunit of the heterotrimeric G protein exchanges a...
- Q hs of woled sonsup a el eau d 1 a Briefly describe the ibe the three stages of DNA re stages of DNA replication Name the enzymes that are involved...
- Q The N terminus sequence of protein X is NH ACGTD The N terminus sequence of protein Y is NH RCGTD You hypothesize that O Protein Y will be more stable...
- Q Which of the following statements is not correct about Horor 1st regulation A Hovokinase exists as several isozymes Hexokinase Il Mindrem tissues with different modes of regulation appropriate to the...
- Q The functional group with the following formula description an oxygen atom bonded to a hydrogen is known as a n O methyl Ohydroxide Ohydroxyl O carbony Ocarboxyl
- Q The functional group with the following formula COOH is known as a ketone O methyl O carbonyl O carboxyl O aldehyde
- Q What do atoms form when they equally share electron pairs O nonpolar covalent bonds O cationic bonds Opolar covalent bonds Oionic bonds Ohydrogen bonds
- Q 2 are linked by to form prot H Pats B Glucose C Amino acids ID Nuclic acids
- Q Can animals make carbohydrates from fatty acids O a Yes because Acetyl CoA can be converted to pyruvate by pyruvate dehydrogenase O b No because Acetyl CoA cannot be converted...
- Q C 0 00 0 23 A Speed 1x Cells contain DNA that controls the production of proteins 00 B Cells are linked together by proteins to make different kinds of...
- Q Question 4 The generic reaction for the formation of an amide is shown below O R 8 0 H NUR R C N R H O a Draw the structure...
- Q Lipids are organic macromolecules that serve a variety of purposes What is the most in portant role of lipids C 0 00 0 14 A to build muscles B to...
- Q O a Can only be used on cubic crystal lattices O b Yields the primary structure of the protein O c Makes use of circularly polarised light that is shone...
- Q Which of the following is not true of chymotrypsin O a It contains a superoxide hole O b It is a serine protease O c It acts on the carboxyl...
- Q molecule s would the enzyme would most likely react with Molecules 0 00 0 17 A C B A Molecule A only Molecule C only B Enzyme Speed 1x C...
- Q justed above and below the enzyme s optimum temperature C 0 00 0 23 Enzyme Activi enzyme activity changes as the temperature is ad A Enzyme Activit B Speed 1x...
- Q 9 indicates the of people who become sick in a population after exposure to an infectious agent a Morbidity b Mortality c Prevalence d Attack rate e Incidence 10 Which...
- Q Posttranslational modifications alter protein function before the proteins have been translated on ribosomes O True O False
- Q 25 3 Four vehicles arrive at an intersection controlled by four stop signs at the same time You would yield the right of way to C A The vehicle to...
- Q What would happen to a growth factor protein if you produced it from an mRNA containing a nuclear localization signal NLS It would end up in the nucleus It would...
- Q Which of the following types of mutations has the HIGHEST probability of changing a SINGLE amino acid in the encoded protein not changing any of the remaining amino acids A...
- Q If we had 6 different DNA RNA nucleotide bases strings of how many nucleotides would be required to uniquely encode all 20 amino acids i e What is the minimum...
- Q C B D FO E A4 66 F 44 H AE C G O 79 What is the large structure indicated by the letter C 80 The letter D refers...
- Q Gene Expression Refer to the following diagrams to answer questions 76 84 C B D CC E UC F A H template DNA strand 76 The letter A refers to...
- Q For items 26 27 and 28 decide whether the description is a dehydration reaction or a hydrolysis reaction 26 When our energy is low between meals enzymes in the liver...
- Q 17 Where would you find the DNA in a prokaryote cell membrane cytoplasm nucleus or mitochondria 18 A neutral molecule with many OH groups will probably be unstable hydrophobic ionic...
- Q 51 A cell must undergo DNA replication to make mRNA True or False 52 If you wanted to break the connection between a sugar and a phosphate in the DNA...
- Q A plasma cell is a type of B lymphocyte white blood cell that has differentiated and specialized to synthesize huge numbers of antibodies very quickly The specific protein structure of...
- Q Alpha 1 4 glycosidic linkages are typically found in storage polysaccharides while beta 1 4 glycosidic linkages are found in structural carbohydrates This is because beta 1 4 glycosidic linkages...
- Q Where would you expect to find receptors for lipid insoluble hormones Embedded in the cytoplasmic membrane exposed to the exterior of the cell O Inside the nucleus O In the...
- Q Chitin peptidoglycan and cellulose are all Please choose all that apply O carbohydrates O polymers of glucose O structural components of cell walls formed from hydrolysis reactions between monosaccharide
- Q You place a plant cell and an animal cell in a hypotonic environment Assume both cells cannot actively respond to this hypotonic environment i e assume they do not actively...
- Q You are studying a structure isolated from cytoplasmic membranes that at its simplest level is composed of amino acids and monosaccharides This structure is most likely a O glycoprotein O...
- Q Fats or vegetable oil or butter are made from Oglycerol Othree fatty acids phospholipids steroids linked to Choose all that apply
- Q There are 250 kcal in 25 grams of fat True O False
- Q Select the correct answer What is Earth s current axial tilt O A 21 5 degrees OB 22 0 degrees O c 22 5 degrees O D 23 5 degrees...
- Q Select the correct answer What does the process of natural selection involve OA OB O C O D preservation of disadvantageous genetic mutations preservation of advantageous genetic mutations preservation of...
- Q 5 DNA synthesis reactions are run with the goal of producing strands between 60 and 100 bases long How might these be visualized in a lab 7 Southern blot membranes...
- Q Then sugar is added to the solution to create a hypertonic solution The sample is then looked at under a microscope again A sample of red blood cells are placed...
- Q The diagram below shows some chromosomal alterations 00 Chromosome 11 99 AB CD AB CD Chromosome T A UDH B 2 3 Which chromosome represents an alteration known as a...
- Q Changes in a population of wild pigs are shown in the graph below Population size Which statement best explains the section of the graph labeled X A B C D...
- Q Through what process can scientists artificially change the DNA code of organisms natural selection A B C gene pool gene shuffling D genetic engineering
- Q Which of the following statements is correct The law of conservation of momentum states that the total momentum of a closed system is constant The law of conservation of momentum...
- Q Question 8 In a n collision Points 1 the total energy does not remain a constant and objects deform during O elastic collision O inelastic collision Operfectly inelastic collision O...
- Q Select the correct answer After glacial deposits in Alaska lichens and fungus started colonizing the habitat These lichens created favorable conditions for annual weeds and other shrubs Finally mixed evergreen...
- Q Select the correct answer Pitcher plants are cup shaped plants that contain a pool of liquid that helps digest food Their brightly colored leaves attract insects which get trapped in...
- Q 15 Size exclusion chromatography is also known as A Paper chromatography B Ion exchange chromatography C Gel filtration chromatography D Thin later chromatography 16 pepsin T F Digestion begins in...
- Q 7 dextran T F Sephadex gels are made of the polysaccharide based resin known as 8 If you measure the distance a photosynthetic pigment migrated on a TLC plate from...
- Q T F A sphincter in the digestive tract is a structure found only in the jejunum T F When spotting a mixture of substances on a TLC plate effective separation...
- Q 3 T F The successful isolation of photosynthetic pigments depends upon their affinity for organic solvents T F Ninhydrin is a reagent that is commonly used to visualize amino acids...
- Q 52 Which is not produced from the degradation of branched chain amino acids A malonyl CoA B succinyl CoA C acetyl CoA 53 Which amino acids are purely ketogenic A...
- Q 44 The ultimate product of complete oxidation of carbohydrates is A pyruvate B acetyl COA 45 Fatty acid synthesis occurs in the A Golgi apparatus cytosol C mitochondria cytosol C...
- Q 54 The structure shown below is H N H N A urea B uridine C carbodiamine D uric acid 01 5
- Q 43 The degradation of which class of biochemicals does not significantly contribute to the release of energy to cells B lipids C proteins D carbohydrates A nucleic acids 43
- Q 41 Phosphorylation at the expense of ATP is catalyzed by A phosphoryl isomerases C protein kinases B phosphatases D All of the above
- Q 36 Which statement is false about most metabolic pathways A The enzymes that catalyze reactions in metabolic pathways generally catalyze only a single step B The rates of pathway reactions...
- Q 35 A patient is found to have a high concentration of cholesterol in the blood and deposits of cholesterol under the skin The patient is diagnosed with familial hypercholesterolemia What...
- Q 34 The structure shown below is 0 9 00 O 31 12 H C CH CH O OH A carnitine B taurocholate
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