Biotechnology & its Applications Questions and Answers

Studies of oxygen transport in pregnant mammals show that the O saturation curves of fetal and maternal blood are markedly different when measured under the same conditions Fetal erythrocytes contain a structural variant of hemoglobin HbF consisting of two a and two y subunits 272 whereas maternal erythrocytes contain HbA Y 1 0 0 5 HbF BPG 2 HbA BPG 4 po kPa 6 8 10 Macmillan Learning EPG 10 4 What is the effect of BPG on the O affinity of hemoglobin BPG has no effect on O affinity BPG increases O affinity O BPG decreases O affinity How can the O saturation curves of HbA and HbF in the presence and absence of BPG be used to explain the different O affinities of fetal and maternal hemoglobin The O saturation curve of HbA undergoes a larger shift on BPG binding than that of HbF suggesting that HbA binds BPG more tightly than does HbF The presence of BPG ensures that HbA always has a stronger affinity for O than HbF The O saturation curve of HbF undergoes a larger shift on BPG binding than that of HbA suggesting that HbF binds BPG more tightly than does HbA The presence or absence of BPG does not explain the different O affinities of HbF and HbA Feedback You have not correctly identified the O saturation curves of HbA HbF in the presence and absence BPG can be used to explain the different O affinities of fetal and maternal hemoglobin The O saturation curve of HbF does undergo a larger shift on BPG bin than that of HbA Macmillan Learning The graph shows that the presence BPG lowers the O affinity of HbA more than it does for HbF

Question 9 In FAME Analysis fatty acids are extracted and later alter to becom Gas Chromatography O Mass Spectrometry O Gel Electrophoresis

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Question 9 What biochemical identification method uses carbon a

different from seedless non vascular plants vascular plants cling to sheltered rocks and non vascular plants are leafy Vascular plants live in bright sunlight and non vascular plants prefer shade Vascular plants use spores to reproduce and non vascular plants use pollen vascular plants are tall and leafy and non vascular plants are very small

Where did we find the proteins from our brain samples O in the supernatant after we centrifuge our samples O in the non aqueous layer O in the pellet after we centrifuge our samples O in the white layer O in the aqueous layer O in the pink layer

Scientists agree that the term biodiversity describes the number and kinds of species in a location on Earth Scientists have also identified alternate measures of biodiversity some of which are important for planning how to preserve biodiversity including genetic biodiversity as well as ecosystem biodiversity Because all life is interconnected and because the biosphere exerts such an influence on our man s presence on Earth it is so very important that biodiversity be preserved Why is biodiversity important to man Check all the statements that are true Most aesthetically pleasing landscapes are poor in diversity of habitats and species The ability to create new crop varieties relies on the unique properties of just one particular plant rather than a genetic diversity O Maintaining genetic biodiversity of wild species of our crops that are related to domesticated species ensures our continued food supply Undisturbed wild areas are important for many human recreation activities Antibiotics are derived from bacteria and fungi O Many plants produce secondary plant compounds that are used as medicines

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cteristics according to one of three types of inhibition reversible competitive reversible noncompetitive or irreversible Reversible competitive Reversible noncompetitive Answer Bank inhibitor binds covalently and permanently at site other than active site Irreversible inhibitor does not alter the maximum reaction rate

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Match the following statements concerning monoclonal antibody production Hybridoma B cell Tumor cell Heterocary Choose The fusing agent polyethylene glycol is used to produce these This is an unlimited source of monoclonal antibody These are the cells you remove from the mouse at the beginning of the procedure These cells die in the

Examine the model BE XX XX Prophase I Metaphase I Anaphase I Which statement best describes the source of genetic variation shown in the model OA Tetrads line up randomly and are then pulled apart resulting in different combinations of maternal and paternal chromosomes OB Two haploid gametes combine chromosomes to form a diploid zygote cell C Random chromosomes move to opposite sides of a cell to form daughter cells through a process called crossing over D Chromosomes are duplicated at the start of prophase to ensure that all daughter cells receive identical copies of the genetic material

What function does the enzyme helicase perform in DNA replication OA It clips sections of supercoiled DNA allowing the molecule to relax and uncoil during replication OB It adds nucleotides to the growing strands of DNA by matching complementary bases OC It connects sugar phosphate groups to form a continuous backbone for each DNA strand OD It unzips DNA s double helix by breaking the hydrogen bonds connecting nitrogenous bases

Which of the following statements best discriminates among phylogenetic trees based on a maximum likelihood approach 1 The preferred tree gives the lowest probability of producing the observed data 2 The preferred tree requires the fewest mutations to occur 3 The preferred tree requires the most mutations to occur 4 The preferred tree gives the highest probability of producing the observed data

When comparing the sequences of a homologous gene in four different species one pair of species shows a 1 difference whereas the other pair shows a 3 difference Which pair diverged longer ago from their common ancestor and why 1 The pair with a 3 difference a larger difference 3 instead of 1 indicates that there has been more time to accumulate mutations 2 The pair with a 3 difference A larger difference 3 instead of 1 indicates that there has been less time to accumulate mutations 3 The pair with a 1 difference a smaller difference 1 instead of 3 indicates that there has been less time to accumulate mutations 4 The pair with a 1 difference a smaller difference 1 instead of 3 indicates that there has been more time to accumulate mutations

The microscopes used by students in high schools and colleges are electron neutron light stereo mic

Total Supernatant Pellet A 1 You are studying Protein X in E coli You perform sp on the LEFT above If you fused PhoA to the C termin expressing this fusion when grown on medium with BO

This is the structure of glycerol Glycerol is a building block of Select all that apply H C OH HC OH H C OH 00000 Phospholipids Steroids Triglycerides Fatty acids Amino acids

Smeedly has ALS You might want to research this disease to see its natural course and prognosis Pain and suffering can take many forms I also suggest that you research the law on euthanasia What states allow some form of it Exactly what form Some students are disturbed by the film If you would prefer an alternative assignment let me know On the Discussion forum marked Euthanasia enter any comments you have on the film and most importantly whether or not you think Smeedly s actions are morally

Identify the organism shown here SCIENCESOURCE

ing monoclonal antibodies in the correct order from first to last Dissociate primary spleen cells in culture medium Individualls First step Last step Answer Bank Fuse lymphocytes with mutant mouse myeloma cells

Yes O No Question 2 1 pts Love occurs instantly between a stepchild and stepparent

After the growing process pesticide residues may remain on food products Which foods have been found to have some of the highest levels of pesticide residues Select all that may apply Apples Potatoes Tomatoes Strawberries Carrots Bell and hot peppers Lettuce Grapes Rasberries Onions

Why are modern crops highly susceptible to disease and pests Modern crops have very little genetic diversity Modern crops are exposed to higher levels of pollution Modern crops are far more robust and resistant than older crops Modern crops lack immune systems and rely on chemical deterrents

Common rationale for why new contraception technologies for sperm producing consumers have been so slow to develop include all of the following EXCEPT O Concerns over consumer safety birth control for all bodies must prove equally safe Men and sperm producing consumers have never shown any interest in consuming these technologies Biological barriers related to disrupting sperm as sperm are in greater number than eggs in fallopian tubes Barriers related to sexism and gendered social norms about whose responsibility birth control consumption is should be

Fill out the table below You can use the text as well as your own ideas Pros of GMOs Cons of GMOs

3 Using one example given so far explain how GMOs can be beneficial to humans or th environment 4 What is meant by the term transgene 5 What is a transgenic organism

Match each method of transgenesis with the descriptions A DNA Microinjection B Stem Cell Mediated Transfer 11 A transgenic chimera is created 12 Fertilized eggs are injected with foreign genes 13 Method used to produce normal gene therapy C Retrovirus mediated trans

Alika finds a certain kind of butterfly near her house She reads that ultraviolet light is absorbed by the butterfly s wings red light is transmitted through the butterfly s wings and green light is reflected off the butterfly s wings Under the sunlight which contains all types of light

4 Scientists search the scientific literature by means of electronic databases such as PubMed a free online database maintained by the National Center for Biotechnology Information Use PubMed to find the abstract of a scientific article that Hopi Hoekstra published in 2016 or later Copy and paste the APA citation of the article here 5 points

Understand the Nature of Science Understand that science investigations use a variety of methods and do not always use the same of procedures understand that there is not just one scientific method Science findings are based upon evidence Long ago many people believed that living things could come from nonliving things They thought that worms came from wood and that maggots came from decaying meat This idea was called spontaneous generation In 1668 an Italian biologist Francesco Redi did experiments to prove that maggots did not come from meat One of his experiments is shown below Group I Introduction to the Scientific Method Worksheet Group II Redi placed pieces of meat in several jars He divided the jars into two groups He covered the first group of jars with fine cloth He left the second group of jars uncovered Redi observed the jars for several days He saw flies on the cloth of the covered jars and he saw flies laying eggs on the meat in the uncovered jars Maggots appeared only on the meat in the group of jars left uncovered Questions 1 Which is not a step in the scientific method a Problem or question b Research c Ask other people for their opinion d Arrive at a conclusion 2 What was the problem in Redi s experiment a How do maggots appear in meats b How do worms appear in wood c Is spontaneous generation a valid explanation for maggots in meats d All of the above are examples of problems

D Question 6 Which of the following is not a

differentiate neurons bases on different physical chemical and connective properties of the cells

You are working in an organic chemistry lab to engineer novel synthetic amino acids for optimization of cyborg proteins You discover the one below To what category would it belong Note that the non ionized form is shown H H H N C C OH O OH non polar polar positively charged polar negatively charged

Which of the following is NOT true for a hydrolysis reaction Othey require the addition of a water molecule Othey break bonds and release energy Othey require specific enzymes they allow monomers to join to create polymers

Before placing the slide on the stage of a compound light microscope which of the actions must be completed Select all that apply Raise the stage all the way using the coarse focus knob Rotate the revolving nosepiece and click the 10x objective lens into place Rotate the revolving nosepiece and click the 4x objective lens into place Turn on the microscope using the power switch Lower the stage all the way using the coarse focus knob

Macmillan Learning After 41 0 min 18 0 of a compound has decomposed What is the half life of this reaction assuming first order kinetics 11 2 18 72 min

What type of radiation is used in a smoke detector O High energy photon O Gamma radiation O Beta radiation O Alpha radiation

Identify the number of nuclei in a carbon atom 0 1 02 O O O 3

Question 1 Points 3 Which of the following radioisotopes are used in the PET I C 11 II N 13 III O 15 IV F 19 OI II III and IV O I II and IV O I II and III

A traditional and derogatory name for female secretarial and managerial office workers in middle and lower classes is O Striped collar Silk collar Pink collar

6 CO2 6H O C6H1206 602 How many molecules of product are there in the chemical reaction described above 01 02 O 6 07 12

In which of these cells would a mutation affect only one organism and not be passed to future generations Select THREE correct answers

Question 4 Points 2 Select the word equation for the chemical reaction between iron and chlorine to form iron III chloride Otron s Chlorine g Ferrous chloride Iron 5 Chlorine s Ferric 1 chloride Iron 5 Chlorine s Ferrous chloride s Otron s Chlorine g Ferric chloride s

Points 3 Jolene was experimenting with a white colored substance She found that the substance as salt Which of the following results could she have obtained Question 3 Negative for iodine test positive for heat test and negative for vinegar test O Negative for iodine test negative for heat test and negative for vinegar test O Positive for iodine test positive for heat test and negative for vinegar test Positive for iodine test positive for heat test and positive for vinegar test

O Heating the sugar cube with a candle Question 7 Points 2 Diane is experimenting with sugar cubes Which of the following causes a sugar cube to only change physically not chemically O Dissolving the sugar cube in water Eating the sugar cube and digesting it What you want to do Q Caramelizing the sugar cube on a pan 21

What test is useful in the identification of cocaine O Scott test O Marquis test O Van Urk tests Heat test bath House Points 1 My Activities lephp v 1 Row Dia Tell me what you wan

Which of the following is correct O A mixture is homogeneous and a pure substance is heterogeneous O A mixture has a fixed boiling and melting points whereas pure substance varies O The density of a mixture and a pure substance changes with pressure O The composition of a mixture can vary but the composition of a pure substance is always the same

Identify the correct statement from the following O Conversion of liquid to gas is takes place when heat is applied O Conversion of gas to liquid is takes place when heat is applied O Conversion of solid to liquid takes place when heat is removed O Conversion of solid to liquid is not possible

Freezing is the reverse process of melting O Remove the heat energy O Decrease the temperature O Decrease the internal energy All of the choices to convert a liquid into solid