Biology Questions

tion 36 ion 35 lls You modify a deadly pathogen to have no antigens on the cell surface What is the predicted host immune response O The response becomes much weaker as the pathogen is no longer easily recognize and destroyed O The response becomes much stronger as the pathogen is now easily recognized and destroyed O The response becomes much stronger as the pathogen has had all pathogenicity factors removed O The response becomes much weaker as the pathogen has had all pathogenicity factors increased ed cells are ordered to kill themselves by

The most recent common ancestor within a clade on a phylogenetic tree is represented by the O Node O Limb O Bud 3

What is the log base 10 of 6 Answer with two significant digits

Choose the word that correctly completes this analogy maintain preservation reimburse A dispose B correlate C compensation D transpose

Jestion 45 O Macrophages O Memory cells O Natural killer cells O Interferon healthcare professional agricultural a tion 44 Your resistance to re infection by the same disease is dependent on which are a pare your adaptive immune system disease is specifically one acquired throu

28 You are cleaning up a spill of a bacterium with bleach bleach kills 90 of this particular bacterium every five minutes If you start with let bleach sit on the spill for twenty minu and found at that point that only 50 bacteria are still alive what was your starting population Final population initial population x remainder population total time killing period Round your answer to a single significant digit for example 200 000 000

Who should be vaccinated against HPV infection A Infants and young children B Teenagers between the ages of 11 18 C Baby boomers who were not vaccinated earlier in life C The elderly and immunocompromised

O Air O Water O Osmosis O Sodium chloride Question 42 What distinguishes granulocytes from phagocytes Phagocytes are immunoprivileged Granulocytes release toxic chemicals O Granulocytes are only inside organs

If you take 1ml of a bacterial sample and add it to 9ml of ster create a first dilution From the well mixed first dilution you take 1ml and add it to 9ml of sterile nutrient fluid and mix well creating a second dilution From the second dilution you take 1ml and add it to 9ml of sterile nutrient fluid and mix well creating a third dilution Finally you take 1 ml of the third dilution and add it to 9ml of sterile nutrient fluid mixing well and creating a fourth dilution This represents common technique for membrane filtration The third sample represents a 1 200 dilution of original bacterial sample The number of bacteria in the fourth dilution would be multiplied by 1000 none of the above

The following organ systems are involved in maintaining homeostasis of the body Match each organ system to its primary function s Absorbing nutrients and secreting waste Gas exchange acquiring oxygen and expelling carbon dioxide Transporting and distributing nutrients and gasses throughout the body 1 Integumentary system 2 Digestive system 3 Respiratory system 4 Cardiovascular system

1 How Science Works Question 5 Which of the following is the best reason for why science in the real world can be described like a pinball machine instead of a linear step by step recipe for discovery Select one Science is unpredictable you can t always plan for the next step Science is completed alone just like playing pinball Science is like a game there are winners and losers Science involves talking to many people bouncing from person to person

Choose all that apply D8 How Science Works Question 7 Which of the following are examples of different fields of engineering 8 1 Chemistry and Environmental Science Biology and Physics Electrical and Chemical

Why is a pilus considered to be a potential virulence factor O It increases endotoxin production It increases exotoxin production O It allows a bacterium to swim very fast It helps a bacterium attach to host cells

A cell consumes acetate and uses the carbon from it to make starch This must be a an pathway O Fermentation O Catabolic O Anabolic O Respiration

Cycles of Matter and Energy Transfer in Ecosystems Question 6 What is a carbon reservoir Select one 60 O A place on Earth that can store carbon dioxide gas O O A place on Earth that can store carbon in any form Anywhere underground that can store carbon as carbon dioxide gas OA place on Earth that releases carbon into the atmosphere

What is the most correct chemical reason that phospholipids are able to form cel membranes O They are covalent They are non polar O They are amphipathic They are polar

Which part of persuasive speech analysis does the following passage determine A chemist with a background in research and medicine will be speaking A Speaker s credentials B Speaker s bias C Setting of speech D Speaker s purpose

Select one a a Cycles of Matter and Energy Transfer in Ecosystems Question 2 In a food chain a carnivore is most likely 81 O A tertiary consumer A producer O A herbivore A primary consumer

You need to make a bandage to be 7 cm in length but the ruler you are given is only marked in mm You measure the bandage to the mm mark

3 Tetracycline is bacteriostatic whilst penicillin is bactericidal What is the difference between their activities 4 Which is more important in getting your clothes clean the laundry detergent or the washing machine Explain 5 What are 2 ways hyperthermophiles have adapted to extreme heat

Many patients begin coming in infected with a strange new bacterium Every one of the patients was recently bitten by a mongoose From all of this you can correctly infer that the disease O Is transmitted vertically O Must be solely vector borne O Uses the mongoose as a reservoir O Is a pandemic

What is the most common method scientists use to tell others about their findings Select one O O O O They send emails to all of their colleagues They print out their data to be mailed to the community They publish their results in professional journals They call their colleagues on the phone to tell them

Works Question 9 Stability and change is one of the crosscutting concepts used in science 1 When would a scientist MOST likely use this crosscutting concept elect one O O O When looking into how long it takes for butterflies to reach their winter habitats When attempting to see which chemicals are found inside a new brand of fertilizer When investigating how the parts of an ecosystem react to intense heat When investigating the prey preferences of mountain lions living in the northeast

Q4 6 What does it mean to say that extension by DNA polymerase III proceeds 5 3 The 5 end of a DNA polymerase molecule attaches to the 3 end of primase ODNA polymerase adds nucleotides to a growing strand moving in the 5 3 direction ODNA polymerse seals nicks as it moves along a DNA strand toward the 3 end ODNA polymerase can only synthesize DNA at the 5 end of an existing strand of DNA

Question 2 Fil In The Blank Worth 4 points 10 W m impacts a surface and only 3 W m is reemitted back what is the surface s albedo as a perce umerical Answers Expected nswer for Blank 1

FIRST BASE U C A G UUU UUC UUA UUG CUU CUC CUA CUG AUU AUC AUA AUG GUU GUC GUA GUG U Phenylalanine Phe 200 o Concates the Leucine Leu Leucine Leu Isoleucine lo Methionine Met Start codon Valine Val Met Pro Arg Val UCU UCC UCA Uca CCU CCC CCA coaj ACU ACC ACA ACG GCU acc GCA GCG C Serine Ser Proline Pro SECOND BASE Threonine Thr Alanine Ala UAU UAC Tyrosine Tyr UAA Stop codon UAG Stop codon CAU CAC Histidine His CA Glutamine Gin AAC Asparagine Aan AAA AAG Lysine Lys GAUT GAC Aspartic acid Asp Glutamic acid Glu GAA GAG UGU UGC Cysteine Cys UGA Stop codon UGG Tryptophan Trp CGU CGC COA COG AGU AGC AGA AGG G GGU Gac GGA GGG Arginine Arg Serine Ser Arginine Arg Glycine Gly DUAO UCAG DYCC DUMO THIRD BASE Consider the mRNA sequence 5 AUG CCC CGU GUC 3 What sequence of amino acids would this be translated into

You want to isolate a mesophile with a high sulfur requirement Which of the following would be the most appropriate growth medium condition O High amino acids 30 C O High lipids 98 C High lipids 30 C O High amino acids 98 C

Select one a De Cycles of Matter and Energy Transfer in Ecosystems Question 8 In a food chain an herbivore is most likely De O A tertiary consumer O O A primary consumer A producer O A secondary consumer

What is mutualism O Both organisms benefit symbiotic O One organism eats the other not symbiotic O One organism benefits other is not harmed symbiotic OTwo organisms engage in helpful interactions not symbiotic One organism benefits other is harmed symbiotic

Question 3 Multiple Choice Worth 4 points Why is it impossible to perfectly predict future weather O There are too many weather variables for people and computers to handle O There is a lack of observable data in many areas of the globe i e the oceans O The data that does exist isn t dense enough to accurately portray the state of the atmosphere All of the above

Which of the following is a function of the cell wall and not of the cell membrane Definition of concentration gradients Transporting wastes Protection from osmotic stress and pressure Binding of exterior molecules Secretion of interior molecules Ho

Agar plates are incubated upside down O True O False

The image above is indicative of a pure culture O True False

Of the following which is NOT an innate barrier to infection O Lysozyme O Tears O Hair O Skin

What is the mRNA made using the coding sense strand DNA sequence 5 GTCCATGATACGATGTAA 3 O 5 GUCCAUGAUACGATGUAA 3 O 5 UUACAUCGUAUCAUGGUC 3 O 5 CUGGAUCUAUGCAUCUAA 3 5 GUCCAUGAUACGAUGUAA 3 5 CAGGUACUAUGCUACAUU 3

How Science Works Question 10 Which of the following science and engineering practices involves creating a process to generate and collect data to be used as evidence Select one Constructing Explanations O Planning and Carrying Out Investigations O Engaging in Argument from Evidence

Recall that E coli a prokaryote transformed with the pGLO plasmid expresses the GFP gene from jellyfish a eukaryote Why is it possible for prokarvotes to express eukaryotic DNA O Prokaryotes and eukaryotes are both made up of cells O Prokaryotes and eukaryotes share similar genes O Prokaryotes and eukaryotes share the same genetic code O Prokaryotes and eukaryotes both have nucleotides in their cell nuclei

Why is using a model to show the structure of the universe an advantage to science Select one De O O The sun prevents observing any of the other stars The view of space constantly changes due to Earth s orbit The universe is too large to be seen all at once Stars are too bright to view of them at night

Green fluorescent protein GFP is commonly used in molecular technology to visually label specific cells when it is expressed The structure of GFP is shown below as a ribbon diagram Consider the thick ribbon segments forming FLAT ARROWS Which Photo credit https www rcsb org structure 60FN Each segment represents primary structure These are beta pleated sheets These are alpha helices The structures are formed by disulfide bonds between cysteines Each segment represents quaternary structure The structures are formed by hydrogen bonds between amino acids Each segment represents tertiary structure Each segment represents secondary structure Range the following correctly describe these structures Choose all that apply

A scientist discovered plant life on Mars She brought it back to the space station to test the leaves of the plant in order to determine what type of pigments functioned best on Mars Only a single pigment pigment A was found The absorption spectrum of pigment A is shown below What is the INDEPENDENT variable in the experiment Absorption 0 6 0 5 0 4 0 3 0 2 0 1 0 Absorption spectrum of pigment A from martian plant specimen 2355 400 450 O absorbance 500 550 600 650 700 wavelength nm O wavelength of light O type of leaves O amount of pigment

Sister chromatids separate during O metaphase of mitosis O anaphase I of meiosis 700 O anaphase of mitosis O metaphase II of meiosis

sample double stranded DNA and transcribe mRNA from this DNA Then you analyze the base composition percentage of each base found in each strand for each the two DNA strands and the one mRNA strand Numbers in the table below indicate the percentage of each base in the strand Note results may differ from the true value by about 1 that is the best estimate that the machine you used can make A STRAND 1 40 1 STRAND 2 21 5 9 5 STRAND 3 40 0 29 0 Questions G 28 9 b Which strand would have the C 9 9 29 9 9 7 a What nucleic acids make up strand 1 Select T 0 0 39 1 21 3 U 21 1 0 0 0 0

Look at the picture of the sharp object below It is part of an animal What function does this structure have OA To protect the organism OB To see predators OC To hear the outside world D To help the organism reproduce

61 Select one 01 1 How Science Works Question 8 Which of the following best describes the main goal of engineering O To ask testable questions B O To determine relationships between variables present in data To gather evidence that supports a claim To develop solutions to problems

10 Blood Pressure Activity During this activity group members are to take turns as the test subject Following the protocol each test subject will have the sphygmomanometer placed on their upper arm followed by blood pressure measurement a What are some possible sources of error or variation in this technique of blood pressure measurement b Is the following statement true or false Clinically two careful measurements of blood pressure with a one minute interval are recommended A repeat measurement should be taken when there is any uncertainty

A foil is a character whose traits contrast with and therefore accentuate the main character s traits After reading Saki s The Interlopers you can see that Ulrich s and Georg s men act as a foil to Ulrich and Georg in that A the men are not as actively and hatefully part of the feud as their masters are B their men are not loyal to anyone while Ulrich and Georg have always been loyal to each other C their men wanted the feud to keep going while Ulrich and Georg kept trying to settle it

In some organisms cells can undergo mitosis without then undergoing cytokinesis This would produce O cells lacking nuclei Ocells that are unusually small Ocells with more than one nucleus destruction of chromoromor

1 Select one A student comes across a diagram of a whale skeleton It shows the locations of all the bones and has a short description of how they work 8 Which crosscutting concept would BEST relate to this scenario O Structure and function C Scale proportion and quantity O Energy and matter Cause and effect

Energy from passing high energy electrons down the steps of the electron transport chain is harnessed to move protons via active transport into the mitochondrial intermembra space How does this help mitochondria to produce energy O The movement of protons sets up an electrochemical gradient that drives ATP synthesis in the mitochondria O The protons receive electrons from the NAD and FAD O The protons are transferred to oxygen in an energy releasing reaction O The protons pick up electrons from the electron transport chain on their way through the inner mitochondrial membrane

Q4 10 Observe the replication bubble below The cell has been exposed to a poison and it reached this point in DNA replication but was unable to proceed further As with other diagrams in this module DNA is shown as black and RNA if present is red What is the most likely effect of the poison Hint Identify which enzymes have already done their jobs inside the bubble and which haven t 5 3 53 5 3 It stops DNA polymerase I from working It stops ligase from functioning It stops DNA polymerase III from working 3 5