Biology Questions

Which would ake a Question 5 1 point 1 Listen All of the organisms within a clade share a a A legal pad A spiral bound notebook None of the other answer choices is correct A 3 ring binder b c friend d common ancestor metabolic function kingdom

a b C d e Maintaining professionalism in email correspondence to your instructor Adhering to the lab safety standards Coming to class on time All of the answer choices listed are correct Acting and dressing appropriately in lab

Which statement is true about the phylogenetic tree below Slime molds Animals Fungi Spirochetes Proteobacteria Cyanobacteria Planctomyces Bacterioides cytophaga Thermotoga Aquifex Green filamentous bacteria Entamoebae Methanosarcina Gram Methanobacterium Methanococcus T celeer Thermoproteus Pryodictium Halophiles Rooted phylogenetic tree Plants Ciliates Flagellates Trichomonads Microsporidia Diplomonads Bacteria Archea Slime molds Plants Algae Protozoa Animals Crenarchaeota Nanoarchaeota Euryarchaeota Eukarya Fungi Gram Chlamydiae Proteobacteria Green nonsulfur bacteria Actinobacteria Planctomycetes Spirochetes Fusobacteria Cyanobacteria blue green algae Thermophilic sulfate reducers Acidobacteria Unrooted phylogenetic tree Bacteria and Archea have a different common ancestor The length of the branches indicates time Fungi and slime molds are more closely related than plants and animals Branching points stand for the common ancestor of two diverging groups

Option 3 Create an original collage or original piece of artwork responding to one Lincoln s central claims or da something else creative in response to it please discuss with me first Please submit your response on the next slide

SAFAT RENK Using the figures Figur 3 28 book respectively as a starting point create a flowchart that indicates the basic steps of cell division and replisome movement in a dividing cell for both a rod shaped and a spherical cell Highlight differences in the process that are dependent upon cell morphology Include the bolded key terms from Section 3 4 of the book NEAR BR MILITACRILATES Origin of replication DNA origin replicates and gras DNA replication continues bideectionally DNA starts next round Septum forms 2 ring Division into two cel Terminator sequence Origin of replication Two plomes Fiz uma Zring Torminator aquanon Fact in cytoplasm Zring Old pole New pole New pole is now old 18 Copyright 2020 W W Norton Company lec Copyright 2020 W W Norton Company Inc After creating your flowchart answer the following New poles New polos are now nid Old pole Cell growth Beginning of cell division Old pole

pH describes how acidic or basic an aqueous solution is True False

Why is a spectrophotometer important in science To determine the concentration of a particular chemical in a materi All of these answers are correct To determine the chemical make up of a material

True False Question 10 1 point Listen You should always fill up the solution to its volume at the beginning of making a solution even though you have to adjust the pH True False

10 100 0 1 1000 Question 8 1 point C Listen In order to correctly load a micropipette with fluid you must Add a tip and push the plunger to the first stop Add a tip and push the plunger to the second stop Push the eject button Turn the white wheel on the pump upward

A DNA has too much protein contamination the OD260 OD280 ratio of the sample will be 1 8 lower than 1 8 higher than 1 8 lower than 0 8 Question 2 1 point 4 Listen What is the unit of measurement for optical density OD mg cm mol L Cm

What is the unit of measurement for optical density OD Omg cm O O O mol L Cm OD is dimensionless

A DNA has too much protein contamination the OD260 OD280 ratio of the sample will be 1 8 lower than 1 8 higher than 1 8 lower than 0 8

One milliliter equals to how much L 10 100 0 1 1000

The OD value of a DNA sample is 0 6 Its concentration will be 0 30 ng ml 30 g 30 g ml 60 g ml

When using a micropipette if you depress the plunger to the second stop to draw the sample you will get either too much or too little solution too little solution the correct amount of solution too much solution

In order to correctly load a micropipette with fluid you must Add a tip and push the plunger to the first stop Add a tip and push the plunger to the second stop Push the eject button Turn the white wheel on the pump upward

You should always fill up the solution to its volume at the beginning of making a solution even though you have to adjust the pH True False

What is the unit of absorbance which can be derived from Beer Lambert s law No unit 1 gm 1 cm cm 1 mol cm 1 Question 10 1 point 1 Listen A DNA sample gave a purity ratio of 1 That means that the sample is Pure DNA Contaminated with proteins Contaminated with lipids Contaminated with carbohydrates

Molarity is defined as the number of moles of solute that are dissolved in ImL of solution True False Question 4 1 point Listen Kate made a solution that needs to be at a pH of 12 The solution has a pH of 5 8 What should Kate do Add drops of HCl until the solution pH reads 12 Add drops of KOH until the solution pH reads 12 Add more water until the solution pH reads 12 Add more solute until the solution pH reads 12

O 0 5 1 0 0 1 0 0 1 1 0 0 01 1 0 Question 8 1 point Listen false The absorbance of a sample as measured by UV visible spectrometry is inversely proportional to the concentration of the sample such that as the concentration increases the absorbance decreases True or True

What is the unit of absorbance which can be derived from Beer Lambert s law No unit 1 gm cm 1 cm 1 mol cm 1

A DNA sample gave a purity ratio of 1 That means that the sample is Pure DNA O Contaminated with proteins Contaminated with lipids Contaminated with carbohydrates

The best tool to measure 346 L microliters O A PTP plastic transfer pipette A 1 1000 L micropipette A 5 50 L micropipette A 20 200 L micropipette

The reliable absorption range of a spectrophotometer is O Oo 0 5 1 0 0 1 0 0 1 1 0 0 01 1 0

Kate made a solution that needs to be at a pH of 12 The solution has a pH of 5 8 What should Kate do Add drops of HCl until the solution pH reads 12 Add drops of KOH until the solution pH reads 12 Add more water until the solution pH reads 12 Add more solute until the solution pH reads 12

The absorbance of a sample as measured by UV visible spectrometry is inversely proportional to the concentration of the sample such that as the concentration increases the absorbance decreases True or false True False

Molarity is defined as the number of moles of solute that are dissolved in 1 mL of solution True False

There are 100 1000 10 1 ml in 1 L

The best tool to measure 146 l solution is O P 200 P 2 P 1000 P 20

erg law is a logical consequence of Mendel s first law of segregation and expresses the tendency toward equilibrium inherent in Mendelian heredity Let us select for our example a population having a single locus bearing just two alleles T and 1 The phenotypic expression of this gene might be for example the ability to taste a chemical compound called phenylthiocarba mide Individuals in the population will be of three genotypes for this locus T T T t both tasters and t t nontasters In a sample of 100 individuals let us suppose that we have 20 of T T genotype 40 of T t genotype and 40 of t t genotype We could then make a table showing the allelic frequencies remember that every individual has two copies of the gene Genotype T T T V 1 Total Number of Individuals 20 40 40 100 Sperm T 0 4 t 0 6 Copies of the T Allele 40 T 0 4 TIT 0 16 Tit 0 24 40 0 80 Of the 200 copies the proportion of the T allele is 80 200 0 4 40 and the proportion of the r allele is 120 200 0 6 60 It is customary to use p and q to represent the two allelic frequencies The genetically dominant allele is represented by p and the genetically recessive by q Thus p frequency of T 0 4 q frequency of t 0 6 Therefore p q 1 Ova Having calculated allelic frequencies in the sample let us determine whether these frequencies will change spontaneously in a new genera tion of the population Assuming that mating is random gametes are sampled independently in pairs each individual contributes an equal number of gametes to the common pool from which the next genera tion is formed Frequencies of gametes in the pool then equal the al lelic frequencies in the sample 40 of the gametes are T and 60 are t ratio of 0 4 0 6 Both ova and sperm of course show the same frequen cies The next generation is formed Copies of the t Allele 0 40 80 120 t 0 6 T t 0 24 t t 0 36 Collecting genotypes we have frequency of T T 0 16 frequency of T t 0 48 frequency of t t 0 36 Next we determine the values of p and q from the randomly mated pop ulations From the table above we see that the frequency of T is the sum of genotypes T T which is 0 16 and one half of the genotype T t which genotypes is 0 24 T p 0 16 5 0 48 0 4 Similarly the frequency of t is the sum of genotypes t t which is 0 36 and one half the genotype T t which is 0 24 t q 0 36 5 0 48 0 6 The new generation bears exactly the same allelic frequencies as the parent population Note that there has been no increase in the frequency of the genetically dominant allele T Thus in a freely interbreeding sexually reproducing population the frequency of each allele would re main constant generation after generation in the absence of natural se lection migration recurring mutation and genetic drift see text A mathematically minded reader should recognize that the genotype fre quencies T T T t and t t are actually a binomial expansion of p q p q p 2pq q 1 Note that the equilibrium calculations give expected frequencies which are unlikely to be realized exactly in a population of finite size For this reason finite population size is a cause of evolutionary change Most genes have more than just a single pair of alleles especially when we measure genetic variation at the DNA sequence level The bi nomial expansion shown above can be used for any number of alleles Suppose that we have three alleles T T2 T3 whose frequencies are denoted p q and r respectively We now have six possible genotypes with the following Hardy Weinberg equilibrium frequencies TT TT TT TT3 T2 T3 T3 T3 p q r p 2pq q 2pr 2gr As the number of alleles at a gene increases the proportion of the popu lation having heterozygous genotypes also increases

17 Assume that you are sampling a trait in animal populations the trait is controlled by a single allelic pair A and a and you can distinguish all three phenotypes AA Aa and aa intermediate inheritance Your sample includes Population I II AA 300 400 Aa 500 400 aa 200 200 Total 1000 1000 Calculate the distribution of phenotypes in each population as expected under Hardy Weinberg equilibrium Is population I in equilibrium Is population II in equilibrium STRE

How do sedimentary rocks differ from igneous and metamorphic rocks Sedimentary rocks are made from the weathered materials of previously existing rocks Sedimentary rocks crystallize from molten rock O Sedimentary rocks form under intense heat and pressure

Limestone forms through the precipitation of calcite on the seabed or a lake bed O True O False

Breccia is well sorted O True O False

Conglomerate has rounded grains True O False

Sedimentary rocks form through a sequence of events I don t list all the steps in the choices below but I list most of them Choose the answer that lists them in the proper ORDER O transportation lithification weathering deposition O weathering deposition transportation lithification weathering transportation deposition lithification

Detrital sedimentary rocks differ from chemical sedimentary rocks in that detrital sedimentary rocks form by chemicals precipitating on the the sea floor or a lake bed True False

Match the term with its definition endosymbiotic theory germ theory of disease spontaneous generation cell theory Choose cells are the fundamental units of organisms life arises from non life disease can result from microbial infection mitonchodria and chloroplasts arose from prokayotic cell being encorporated into eukaryot Choose Attempt due 24 Minute Choose

Which of the following is a difference between prokaryotic and eukaryotic plasma membranes prokaryotic plasma membranes have a lipid bylayer while eukaryotic plasma membranes do not O prokaryotic plasma membranes contain sterols while most eukaryotic plasma membranes do not eukaryotic plasma membranes have a lipid bylayer while prokaryotic plasma membranes do not O eukaryotic plasma membranes contain sterols while most prokaryotic plasma membranes do not

Eukaryotic cell walls contain peptidoglycan O True False

Which of the following external structures can help prevent a bacterium from being destroyed by phagocytosis O flagella O pili O capsule O fimbriae

Which of the following structures are used by some bacteria as they transfer DNA between bacterial cells O pili flagella fimbriae capsule

Which of the following types of cell walls is are made up of many layers of peptidoglycan none of the choices are correct O acid fast O Gram negative O Gram positive

What is the name of the waxy lipid found in the cell wall of acid fast bacteria O teichoic acid O lipid A O mycolic acid Olipopolysaccaride

How would you describe streptococci O cluster of circles Ochain of circles Ochain of spirals

What is contained within the nucleoid O a chromosome O ribosomes O lipids proteins

Which of the following is small circular piece of DNA independent of the bacterial chromosome O ribosome O endospore O inclusion O plasmid

Which of the following is a survival structure made by members of the genera Bacillus and Clostridium O nucleoid O ribosome O endospore O inclusion

Which of the following structures controls what enters and exits a cell O capsule Ocell wall O flagella O plasma membrane

If a cell were placed in a hypertonic solution what direction would water move O the water would flow in and out of the cell equally O the water doesn t move O into the cell O out of the cell