The Living World Questions and Answers

Why do we use positive control in the reaction To use it as a benchmark result for the unknown test sample To test the efficiency of the PCR To test for viral RNA Both To use it as a benchmark result for the unknown test sample and To test the efficiency of th

In ELISA the enzyme horseradish peroxidase HRP is bound to the region of the secondary antibody well of microtiter plate SARS CoV 2 antigen the tested sample

Why is it necessary to wash the samples repeatedly in ELISA To enhance the interaction between antibody and antigen To remove any proteins or antibodies which are unbound To increase samples concentration To make the sample clean Question 6 1 point Listen An antibody is Are also called immunoglobulins or lgs Made up of variable domains and a constant domain Composed of glycoproteins All of the above Y shaped in antigens

What is the purpose of the ELISA test for this lab To detect COVID 19 virus from serum in people who might have been infected To produce COVID 19 antibody from serum in people who have been infected To detect COVID 19 antibody from serum in people who might have been infected To isolate COVID 19 virus from serum in people who have been infected

Fill in the blank A colon indicates amino acid positions that have amino acids with A molecular properties

Listen Their primary function of DNA topoisomerase is to cleave DNA strands in order to provide torsional stress relief or to untangle replicating DNA a True b False

Which enzyme makes single strand breaks in DNA backbones a Exonuclease b Topoisomerase c Helicase d Ligase

Topoisomerase does which one of the following a Joins the ends of double stranded DNA molecules b Is required for making recombinant DNA molecules in vitro c Unties knots in DNA molecules d Makes new DNA strands

Fill in the blank A period indicates amino acid positions that have amino acids with properties A molecular

2 Read the question and sample response below Determine how many marks out of 4 you would award the response Remember origin purpose content value and limitation must be addressed Value and limitation must be connected to origin purpose or content at least once Use Source A above in your assessment of the response How many marks out of 4 would you award the response below With reference to its origin purpose and content evaluate the value and limitations of Source A above for a historian studying Japanese expansion and the international response on Japan s road to war The source is an excerpt from a book about the Manchurian Crisis by a historian It is valuable because il contains information about the Manchurian Crisis which was one of the reasons for Japan s expansion Because it is a secondary source it has loss value than a primary source

Which of the following represents a weakness in using GDP to gauge America s economic health

Which statement about the reductive division of meiosis is false Multiple Choice During the reductive division sister chromatids migrate to opposite poles of the cell During the reductive division centromeres do not divide At the end of the reductive division each daughter nucleus has one half as many centromeres as the parental nucle During the reductive division homologues migrate to opposite poles of the cell

Multiple Choice Homologous chromosomes separate and are pulled to opposite poles of the cell Synapsis of homologous chromosomes Pairs of homologous chromosomes align along the equatorial plate Sister chromatids separate and are pulled to opposite poles of the cell Chromosomes decondense

You are studying meiosis in an organism where 2n 28 How many chromosomes will be present in each cell after meiosis I is complete but before meiosis I begins Multiple Choice 56

6 What is the molecular weight of the large subunit of RuBisCO A 14000 Daltons B 55000 Daltons C 37 kDa D 50 kDa 7 Which type of buffer is used during the elution step in ion exchange chromatography to displace proteins from the beads A High pH buffer B Low salt buffer C High salt buffer D Organic solvent 8 What is the purpose of heating samples with sample buffer before protein electrophoresis A To precipitate the proteins B To renature the proteins C To denature the proteins and reduce disulfide bonds D To sterilize the samples

Calculation Qu 1 If you have a protein solution of 100 mL how much ammonium is needed to reach a saturation point of 37 given that the required amount is 210 g L 2 For a 50 saturation of ammonium sulfate how many grams would be needed per liter

What is defined as the entire function of what something can do in an ecosystem detritivoral niche fundamental niche imaginary niche lized niche

Velocity is measured by a None of these b Concentration of product moles reaction time min c Moles Liter d Amount of product mol reaction time min

Our enzyme of interest for this experiment is a Pyruvate kinase b ADP phosphatase c ATP kinase d Phosphoenolpyruvate PEP

hat is true about Hox genes A The absence of Hox genes in plants and their presence in animals shows that plants are not related to animals B Hox genes are identical in all animals because all animals have the same structures C Hox genes are found in all animals because all animals share a common ancestor D Differences between the Hox genes of humans and those of fruit flies prove the two species do not share a common ancestor

EXAMPLE history past present ng 1 source geography clue 2 government goods civics 3 culture economics money 4 geography South America inquiry 5 ocean events river 6 money culture 7 citizenship rights customs ocean 8 history monarchy democracy 2 Complete the sentences Use correct capital letters 1 Culture 2 historian is the study of the physical features of Earth is the study of the rights and Words to us historian culture responsibilities of citizens geograp 3 90graphy is the study of money resources goods econom civic ever and services 4 A events 5 economics and way of life studies history includes information about customs In history class you study civics from the past

UNIT 1 EXAMPLE You hear I m Gia I study life science You write I m Gia I study 1 Hi I m Ben I study planets and the life 2 Hello I m Mrs Park In my class you learn about 3 I m Matt I study 4 Hi I m Amy You are in my 5 Good morning I m Mr Dunn Welcome to 6 Hello I m Mr Reed I teach 7 Hey I m Nate My class focuses on the Ea science sonsize to livi engin univ non appli phy things things science class 5 Listen Write yes or no D EXAMPLE You hear Science is a way to solve problems You write yes 1 2 3 science of s

3 1 2 2 Complete the sentences 4 1 Life science is the study of universe things 2 Scientists nprast things when they think about what is different 3 Earth and space scientists study our planet and the empor 4 Scientists ving Words to use universe contrast non living things when they think about what is the same 5 Physical science is the study of non living things living compare at the science steps in order Investigate together Discuss your ideas

QUESTION 48 Most of the cellular RNA is in mRNAs form True O False QUESTION 49 The initiator tRNA enters the 30S ribosomal subunit at the during prokaryotic protein synthesis QUESTION 50 Another name for protein synthesis is

Why do we study Earthquakes a to know exactly when and where an Earthquake will happen b to help determine exactly how intense an Earthquake will be c to help describe explain assess and possibly help to determine if an Earthquake is likely d because people too indifferent toward Earthquakes e because we have too much time on our hands

17 Both DNA and mRNA carry information for making things How is this information carried so that the correct products are made

Saved Help Save Exit Submit A student set up an experiment to show the effect of light color on photosynthesis in Elodea plants She filled two test tubes with distilled water and placed a piece of Elodea in each of the tubes She added a drop of phenol red which turns red in a basic solution and yellow in an acidic solution She blew in each tube before placing the volumeters on the top of the tube Why did she blow into the tube Multiple Choice to add oxygen to the tube to add carbon dioxide to the tube to add carbohydrates to the tube to add sodium bicarbonate to the tube i

s quiz assignment 7 Saved Help If a solution is undergoing a reaction where CO2 is being used as a reactant what color is the phenol red containing solution shifting towa Multiple Choice colorless red green pink yellow

Of the visible light spectrum the rate of photosynthesis is greatest under Multiple Choice O red light O blue light green light yellow light O orange light

When something appears blue it is absorbing all colors except Multiple Choice green yellow red orange blue

Green and yellow wavelengths of light are not useful to most plants True or False True False

The extinction rate is of course important when assessing the Sixth mass extinction or potential thereof What other variable is equally important Describe a scenario where we reach 75 extinction of species What does the E MSY need to be What else has to occur

Mass extinctions show slower than average extinction rate values True O False

Discuss two ways that a larger body is advantageous over a smaller body One reason must relate directly to climate the other to ecological relationships to other animals Reference the figure below as you make your points

During the Quaternary temperatures became O even colder O stayed the same warm like the early Cenozoic

Cursorality allows for O better swimming O faster running O better climbing O better digging

Cursorality is an adaptation that involves changes to leg proportions Which answer describes the changes correctly stronger joints but otherwise typical O larger feet O longer leg bones for a lengthened limb Ostouter shorter eles

ces The time period when the heart is relaxing is called Multiple Choice systole cardiac cycle O diastole O pulse

Herbivores and predators from late in the Cenozoic are smaller in size that earlier in the Cenozoic O True O False k

The early Cenozoic was warmer compared to now O True O False

Which of the following resting blood pressures would be considered normal Multiple Choice 130 90 mm Hg 120 80 mm Hg 140 95 mm Hg 80 50 mm Ha

O the movement of sap in the phloem the movement of water in xylem The uptake of water from soil into roots the transport of hormones within plants the radial movement of water in tracheids upon the formation of an embolus due to cavitation within the phloem Question 8 1 pt Roots anchor a plants and provide structural support produce hormones and alkaloids store carbohydrates and absorb both water and minerals from the soil Given these multiple functions plant physiology is highly regulated and standardized with little variation in function upon changing environmental factors For example water uptake occurs at a predictable and constant rate throughout the length of the root True

True False Question 6 1 pts Transpiration is driven by vapor pressure vapor pressure at atmospheric pressure of 760mmHg is influenced by both solute concentration and temperature and is expressed through a mathematical relationship known as Boyle s Law Avrogado s number Raoult s law

Water is the universal biological solvent It s properties allow life to exist due to waters unique chemical and physical properties True False

2 Whales the Cetaceans represent a second group of mammals that returned to the oceans Describe the body shape of a whale by looking at the skeleton overhead over by the puffins and the shape and number of the limbs

1 The walrus the sea lion and the seal all belong to a group called the Pinnipeds meaning fin foots on the Carnivore branch Their modification of the basic tetrapod foot is extreme but it is still recognizable as a foot For example examine the sea lion skeleton and look at the forelimbs How many digits does it have on each forelimb

6 Along with Placoderms Sharks and rays constitute one of the vertebrates The gill slits are very visible on sharks What function is the shark performing look closely with respect to the gill slits How do sharks and rays differ from other vertebrates with respect to their skeleton

What chromosomes belong to a normal human male O O 22 autosomes and two Y chromosomes 44 autosomes and two Y chromosomes 44 autosomes one X chromosome and one Y chromosome 44 autosomes and two X chromosomes

In a hypotonic solution a plant cell will undergo plasmolysis become flaccid burst

Glycolysis results in the production of CO2 the conversion of glucose to pyruvic acid a net loss of two ATPs per glucose molecule conversion of NADH to NAD