Biology question and answers for December 25, 2023
- Q A well known danger of desert living is heat stroke. While most people think about dehydration and lack of water as a major issue, many don't realize that heat denatures...
- Q the modification of mRNA (editing/splicing)...involves removal of exons and joining the introns together to form the mature mRNAinvolves removal of the cap from the 5' end and removing the tail...
- Q Which of these is NOT a protein function? A. Hemoglobin carries oxygen to the organs and tissues. B. Enzymes speed up reaction rates. C. Antibodies fight infections and diseases. D....
- Q In the "dam" analogy of oxidative phosphorylation, what doesthe dam represent?the electron transport chaincarbohydrateselectronsthe membraneprotons
- Q In order to adapt to a low carbohydrate intake, the body generates ketones, which can be used as an emergency fuel, particularly for the brain, which prefers glucose. Which of...
- Q What is true about proteins? In the tertiary structure, we observe the polypeptide chain, with multiple fundamental structures, adopt a folded heterogeneous shape that is essential for the optimal functioning...
- Q 1. List three conditions that would alter the activity of an enzyme. Be specific with yourexplanations.2. Describe two different catalysts and explain why they would be used in a chemical...
- Q Which of the following statements is false? Smoke is produced when a given type of organic or inorganic material is scraped, sawed, ground, drilled, handled, heated, crushed, or otherwise deformed....
- Q Write one of the three types of solutions next to its description or example. a. Your cells are in osmotic balance and, thus, do not shrink or swell. b. This...
- Q 1. Which of the following is NOT a function of proteins?a. store and transmit heredityb. help to fight diseasec. control the rate of reactions and regulate cell processesd. build tissues...
- Q Which of the following methods can be used to measure protein abundance?1. Western blotting analysis2. Absorption spectrophotometry (measure UV light absorbance at 280nm)3. Bradford Assay4. All of the answers are...
- Q The backbone of DNA and RNA is composed of _. DNA is double stranded due to interactions between adenine, cytosine, guanine, and thymine, which areUracil is a
- Q Water dissociates into _ both. ions. All aqueous solutions contain and _ Hydronium Hydroxide Dissociation of water can be represented by an equilibrium reaction. The equilibrium constant (Kw)for dissociation of...
- Q When enzyme action stops due to a buildup of end product that acts as a regulatory molecule, this control is called Select one:a. competitive inhibitionb. enzyme inductionc. enzyme repression
- Q The fields of genomics and proteomics differ in thatSelect one:a. genomics refers to the study of an organism's entire genome, whereas proteomics is the study of expressed proteins.b. genomics is...
- Q Which of the following functional groups is mismatched to the organic compound in which it is typically found?Select one:a. Phosphate - carbohydratesb. Sulfhydryl - proteinsc. Amino - proteinsd. Hydroxyl-alcoholse. Carboxyl-fatty...
- Q In which stage of cellular respiration is glucose split into to molecules of pyruvate?GlycolysisThe Kreb's CycleElectron TransportAll of the above
- Q When your plasmid contains the regulatory elements of the lactose operon, which of the following forms of regulation could be used to greatly increase the production of your protein product?RepressionPositive...
- Q Rank the following compounds in order from LEAST reactivity to MOST reactivity for an SN2 reaction.A. PhCHBrCH3B. (CH?)?CHCH?CH?BrC. (CH?)?CHCH?CHBRCH,D. (CH?)?CBRCH?CH?CH3
- Q Which of the following situations are occurring when a red flower (RR) and a white flower (WW) produce a pink flower? A. multiple alleles B. incomplete dominanceC. codominance
- Q Researchers investigated the effect of urea on the three-dimensional structure of a certain enzyme. The researchers dissolved the enzyme in an aqueous buffer solution and added urea to the solution....
- Q A researcher proposes a model to explain how enzyme-substrate interactions determine enzyme specificity. The model is based on the idea that substrate molecules form favorable interactions with the amino acid...
- Q Staphylococcus aureus grows best in moderate temperatures, but can grow in coldconditions such as refrigerators. This makes S. aureus a...thermophilepsychotrophhyperthermophilemesophile
- Q The slowed growth or lack of growth of an organism at temperatures or pH outside of itsideal range is most likely due to changes in itsenzymes and proteinsbacterial chromosomecapsulecell wall
- Q 4- Choose the correct sentence; Mildoxidation of the tail of the Aldose produces one of the following: in the space provided give one example with mild-oxidation of glucose.a) Estaerb) Hemi-acetalc)...
- Q Analyze the data to describe how blood glucose levels are impacted by diet, and how insulin injections affect a diabetic person's blood glucose levels. Use evidence from the text and...
- Q Which of the following is evidence that allows scientists to estimate when oxygen production began on Earth? Accumulation of dead plant material that turned into fossil fuelsIron rich rocks that...
- Q 3- Choose the correct sentence; Mildoxidation of the head of the Aldose produces one of the following: in the space provided give one example with mildoxidation of glucose.a) Esterb) Hemi-acetalc)...
- Q 13- The difference between a and b- D-glucopyranose is that: a) In the a conformation, the OH on C1 is down and in b the OH is up. b) In...
- Q 16- The main difference between glucose and fructose is that: 1. Glucose has four chiral centers and fructose has only three. 2. Glucose is poly hydroxy ketone, while fructose is...
- Q A hypothetical "microbullet" shot through a phospholipid bilayer will pass the bilayer components inwhich order?tail ? tailhead ? headhead ? tail ? tail ? headhead ? tail ? head ?...
- Q Which of the following statements is correct?a. The expression: ?G=?H - T?S shows that free energy (G) is directly related to entropy (S)b. A spontaneous change in a system involves...
- Q Mercury is also liquid at body temperature, but it can't replace water in living organisms. Mercury'shydrogen bonds don't hold mercury atoms together, so they break easily and don't require a...
- Q Areas of natural vegetation on the banks of waterways act as "buffers" by:absorbing sediments, nutrients and toxins.preventing fire ants from invading the water.absorbing micro-crystalline wax that bulks the cells of...
- Q The base that complement base-pairs with guanineadenineantiparallelchainreactioncytosinedeoxyriboseO-FranklinhelixhydrogenleadingOnucleotidenucleusOkazakipolymeraseOrepair
- Q Which of the following describes difference between saturated and unsaturated fatty acids?presence or absence of double bonds between carbon atoms in the hydrocarbon chainsaturated fats are solid and unsaturated fats...
- Q What happens when an atom loses an electron?A. It has an increase in the number of protons.B. It has a decrease in the number of neutrons.C. It becomes a negative...
- Q Which of the following are structural isomers of each other?A ribose and pentoseB, glucose and fructoseC. sucrose and fructoseD, Blucose and maltose
- Q What best describes the processes of pasteurization and ultra-pasteurization of milk?Pasteurization raises the temperature to approximately 72 C for 15 seconds, slowly ramping up the temperature, while ultra-pasturization raises the...
- Q Define enzyme denaturation in terms of protein structure. What environmental factors can denature enzymes?What does it mean to say that an enzyme-catalyzed reaction is either enzyme limited or substrate limited?
- Q When an atom of uranium-235 is bombarded with neutrons, it splits into smaller nuclei and produces a great amount of energy. This nuclear process is called__fissionchain reactionfusionionizationdecomposition
- Q You build 2 protein molecules, each from 113 amino acids. The amino acid sequence is identical for each protein molecule, except for the amino acid in position #8. In one...
- Q The following pairs of terms are related. For each pair:a. Define the first term.b. Then tell how the second term relates to it.A complete answer will reflect an understanding of...
- Q 5- Choose the correct statement among the following:a) U and C have Purine ring structuresb) U and T have Purine ring structuresc) T and C have Purine ring structuresd) A...
- Q Rational drug design involves the development or modification of a drug that is designed to interact with a specific biological molecule, the biotarget, to provide a therapeutic benefit. Many of...
- Q Human enzymes stop working at high temperatures because they_____disrupt van der Waals attractions in the enzymesdisrupt hydrogen and ionic bonds in the enzymeschange the three-dimensional shape of the enzymesall choices
- Q An inorganic phosphate (P?) isOphosphate group that is not attached to a moleculeA phosphate group attached to ATPA phosphate group attached to an inorganic moleculeA phosphate group attached to a...
- Q Which is an indication that a chemical change is taking place?Iron changes color when heated.Gas bubbles form in boiling water.Solid wax forms when melted wax falls in ice water.A gas...
- Q As mentioned in the introduction, pH can also influence enzyme activity. The human catalase enzyme functions best at a pH of 7, whereas the stomach enzyme pepsin functions best at...
- Q Amino acids have different characteristics that determine how they function and where they are found in the cell. Which of these is not one of them?Nonpolar and hydrophobicNonpolar and ionizedPolar...
- Q Which amino acid is needed for the biosynthesis of norepinephrine and epinephrine?a. Alanineb. Phenylalaninec. Isoleucined. Leucinee. Serine
- Q A biochemical reaction feels warm to the touch. This means that kinetic energy ileaving the system.What type of reaction is this?Choose all that applyIt is exergonicIt is endergonicIt is exothermicIt...
- Q This week we will be repeating the protein standard curve, and, you will be choosing samples from different milk beverages such as soy milk, oat milk, Muscle Milk or other....
- Q Which of the following correctly pairs a biomolecule to its function?A. Cellulose: stores genetic informationB. Enzyme: increases the rate of a reactionC. Cholesterol: makes the cell walls of plant cellsD....
- Q Which of the following serve as antibodies?carbohydrateslipidsnucleic acidsproteins
- Q Explain why macromolecules are so important to the existence of living organismsBe sure to include:Each macromolecule by nameThe structure of at least one macromolecule and how it helps with its...
- Q In Mitosis, a cell divides cells.2; 4; 2; 42; 4; 1; 22; 2; 2; 41; 2; 2; 41; 2; 1; 2
- Q The function of chaperone proteins is to:1. Increase the flexibility of a protein2. Help proteins fold correctly3. Increase the chances of a protein to interact with other proteins4. Form a...
- Q List the steps of the lectin pathway, define lectin, and the function of the mannose binding lectin.
- Q If bacteria fermented the carbohydrate that is in the medium, then____is produced, and this would cause that the ___change the color of the media.gas; growth of the organismpeptones; pH indicatorammonium;...
- Q Denaturation of protein destroyes the following interactions except:1. peptide bonds of polypeptide chain2. Hydorgen bonds and hydrophobic interactions3. Disulfide bonds between side chains4. lonic bonds between side chains
- Q Which of the following interactions maintain the protein secondary structures?1. Alpha helices and beta sheets stabilized by hydrogen bonds2. Hydrophobic interactions3. Disulfide bonds4. Covalent bonds
- Q Which of the following is NOT a feature of protein domain?1. any segment of a polypeptide chain that can fold independently into a compact, stable structure2. Protein domains are often...
- Q The role of hydrophobic interaction in folding proteins into their tertiary and quaternary structure includes:1. The nonpolar (hydrophobic) side tend to cluster in the interior of the folded protein. In...
- Q List the major subdivisions or components for each of the four types of compounds-carbohydrates, lipids, proteins, and nucleic acids-within living organisms. For example, fats are one major subdivision of lipids.
- Q The cellular region where ribosomes are assembled is the a. nucleolus b. Endoplasmic Reticulum c. nucleus d. lysosomes
- Q Sulfa drugs like Bactrim, given for bacterial infections, inhibit bacteria by blocking folic acid synthesis. The precursor molecule of folic acid is para- amino benzoic acid (PABA). Interestingly, PABA has...
- Q Castration (removal of the testis) which result in rise of which of these hormones?(A) TSH and FSH(B) ACTH and LH(C) ACTH and TSH(D) LH and FSH(E) None of the aboveBEDAC
- Q ALL are lipid soluble- hormones EXCEPT(A) Triiodothyronine(B) Nitric Oxide(C) Aldosterone(D) Progesterone(E) InsulinBCDEA
- Q The following table describes five molecules that belong to the same class.MoleculeHemoglobinAmylaseImmunoglobulinCollagenAquaporinFunctiontransports oxygen in the bloodan enzyme that breaks down starchan antibody produced in response to an invading particlethe main...
- Q Proteins-large complex molecules-are major building blocks of all living organisms. Discuss the following in relation to proteins.a. The chemical composition and levels of structure of proteins
- Q (1 point) There are 4 amino acids below. Draw a large RECTANGLEacid. Draw a large CIRCLE around the one Polar amino acid.
- Q (2points) Explain the difference between essential and nonessential amino acids. Please defineboth. How many of each are there? Which ones are essential? What is a "complete protein?"What is an "incomplete...
- Q 1. John likes to make oatmeal cookies. Each oatmeal cookie supplies about 67 kcal, and includes 3 g of fat, 9 g of carbohydrate, and 1g of protein. Calculate the...
- Q Using the appropriate bond energies, calculate the heat of reaction ?H for the following reaction:You can find a table of bond energies by using the Data button on the ALEKS...
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