Biology Questions

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

ion 3 Multiple Choice Worth 4 points What does lightning contribute to that can ultimately help local ecosystems recycle nutrients in the soil O Noise pollution Wildfires O Migratory navigation for birds O Heat in local bodies of water

In eukaryotic cells transcription and translation O occur together in the nucleus occur together in the cytosol O are separated translation occurs in the cytoplasm and transcription in the nucleus are separated translation occurs in the nucleus and transcription occurs in the cytoplasm

An individual with a karyotype 47 XY 22 is also known as O Tetraploid triploid O Tetrasomy

Multicellular eukaryotes use mitosis and cytokinesis for what three key events Please choose all that apply Asexual reproduction Sexual reproduction Wound repair O Production of haploid gametes from diploid cells

Normal centromeres allow for sister chromatids to be held together following DNA replication but defective centromeres do not enable the spindle apparatus to attach properly Consider a cell with chromosomes with defective centromeres Checkpoint controls would stop these cells from dividing by stopping the cell cycle in O the S phase O cytokinesis Omitosis OG2 OG1

You notice that there was an event on campus and that the left over food from the snack tray has been put out with a free sign on it What you don t know is that someone used their finger to scoop out some of the ranch dressing and that they didn t wash their hands after using the restroom Based on a starting population of 10 bacteria a generation time of 25 minutes and that it has been four hours since the contamination event how many bacteria are in the ranch dressing now Nf N x 2n

Female Drosophila fruit flies deposit mRNA coding for Bicoid protein at the anterior head and upper body side of unfertilized eggs they produce After fertilization a concentration gradient of Bicoid develops ranging from high concentration anterior to low concentration posterior or rear end and abdomen Anterior structure develop in the presence of Bicoid and posterior structures develop in its absence in this way Bicoid plays a critical role in the development of Drosophila Considering its role in the development of Drosophila Bicoid is most likely O a cell receptor O part of the cytoskeleton O a transport protein O a transcriptional regulator

Which forest biome consists of the tallest trees in the world like conifer trees and has mild temperatures with ample rainfall A Tropical rain forest B Boreal forest C Temperate rainforest or coniferous forest D Tropical dry forest

How many chromosomes chromatids and pairs of homologous chromosomes are shown in the image ES O 3 chromosomes 12 chromatids 6 pairs of homologous chromosomes O 6 chromosomes 12 chromatids 3 pairs of homologous chromosomes O 6 chromosomes 12 chromatids 6 pairs of homologous chromosomes O 6 chromosomes 6 chromatids 3 pairs of homologous chromosomes

Explain how mitochondrial dysfunction affects the electron transfer chain and the proteins

You are analyzing DNA to determine which suspect was at a crime scene with a victim You have PCR amplified short tandem repeats STRs from the samples and separated them w gel electrophoresis to perform DNA fingerprinting as follows DNA sources are noted above each lane Victim Lane 1 Suspect 1 Lane 2 Suspect 2 Lane 3 and Crime Scene La 4 DNA was loaded into wells at the top of the gel near the lane labels i e Victim etc Question Based on the data below which suspect left DNA material at the crime scene Please explain your choice referring to specific band s on the gel Victim Suspect 1 Suspect 2 Crime Scene

How many chromosomes are shown in the karyotype below penghr2022 By Edmonds College Dipartiment af undide 6 26 82 82 36 12 22 O 45 23 46 11 AB de 18

How can you determine whether a trait is dominant or recessive Autosomal or sex linked Follows a more complex pattern of inheritance such as incomplete dominance or codominance

plate O the loop must be cooled after sterilization O work within the cone of sterility O liquid media should be mixed O sterilize loop for 3 secs only Question 6 The test tube lid should be placed down on the bench after opening True 0 5 pts

For a patient the results from some tests and consultation with the relevant medical journals the diagnosis is Small Intestinal Bacterial Overgrowth SIBO Small Intestinal Bacterial Overgrowth The small intestine usually has about 10 000 bacteria per ml of fluid In this disorder there are about 100 000 bacteria per ml of fluid This disease of the gastrointestinal tract is caused by a slowing of the normal muscle activity in the small intestine This activity is responsible for routinely removing bacteria from the intestine The Treatment order to treat the disease it was essential to grasp the magnitude of the overgrowth caused by SIBO The bacteria population while symbiotic and essential for normal human life was simply overgrown causing the patient s weight loss through vitamin deficiency Question 5 10 marks The small intestine bacteria while inhabiting areas optimal for growth have a doubling time of roughly h h a your assigned number hours A normal small intestine starting population would be approximately 10K bacteria per ml of fluid a 2 marks Write an equation to model this exponential growth with b x representing the number of bacteria per ml and x representing the time in hours b 4 marks How long will it take for there to be 100K bacteria per ml Round your answer to two decimal places if necessary

Which of the following molecules is necessary for DNA replication within cells but NOT amplification of DNA via polymerase chain reaction PCR O helicase DNA polymerase O nucleotides dNTPs O primers

A species of pea plants produces peas that are either smooth dominant trait or wrinkly recessive trait Two plants are crossed one that is heterozygous dominant and one that is homozygous recessive About what percentage of the offspring should be homozygous recessive OOOO 25 O 100 O 50 O 0

Which of the following is not true when conducting an aseptic technique transfer from a broth to an agar plate O the loop must be cooled after sterilization O work within the cone of sterility O liquid media should be mixed O sterilize loop for 3 secs only Question 6 The test tube lid should be placed down on the bench after opening True 0 5 pts

Consider cancer in humans 1 How does cancer arise i e why does it occur and how does a cancerous cell differ from a normal human one Explain

The oxygen produced by photosynthetic plants comes most directly from O water O air a mixture of gases glucose O carbon dioxide

2 What life stage is indicated by the arrows 3 What are the two large purple objects in this view

Select the Pacemakers maintain the heartbeat in people who suffer from certain defects The function of an artificial pacemaker is to send electrical Impulses that will contract the heart muscles and regulate the pumping of the heart Which condition could be corrected by a pacemaker OA The Individual s sinoatrial node ceases to function OB The Individual s central nervous system fails to signal the heart to contract and relax OC The Individual s arteries are blocked OD The valves in the individual s heart cease to function

1 How Sc A scientist wants to know the age of a redwood tree that has been recently cut down in a forest To figure this out the scientist closely observes the trunk of the tree and notices repeating rings that change in their thickness and shape What crosscutting concept did the scientist use to identify the repeating rings Select one Systems and System Models Cause and Effect

Choose the list that contains only molecules that are involved in DNA replication in a cell Note that this cell has not been infected with any viruses O Helicase DNA gyrase sigma factors transcriptase DNA polymerase helicase RNA primase and ligase O RNA polymerase tRNA ribosomes and mRNA Reverse transcriptase RNA primase ligase and Okazaki fragments

Qwhat means turbidity in microbiology

All of the following characterized the Baroque era in the West EXCEPT the Catholic Reformation Scientific Revolution establishment of colonial empires Cappearance of constitutional regimes

During meiosis genetic variation is generated in the resulting gametes by and independent assortment cytokinesis separation of sister chromatids in anaphase I crossing over

After glycolysis and the citric acid cycle but before the electron transport chain and oxidative phosphorylation most of the energy from the original glucose molecule is stored in which of the following O acetyl CoA O pyruvate O NADH O glucose

EXPECTED RESULTS 1 In the environments you sampled which will have the greatest amount of growth on the nutrient agar plates H has the greates amount of growth Do you expect turbidity in the unsterilized nutrient broth that was incubated 3 Will nutrient broth or nutrient agar provide more information on the variety of bacteria in an environment 2 RESULTS Fill in the following table with descriptions of the bacterial colonies on your plates and your classmates plates Use a separate line for each different appearing colony Area sampled Incubated at 32 C for days Estimated Diameter 2cm Whole Colony Appearance I colony Colony Description Margin Undulate Elevation Pigment Convex y ellow Number of This Type

your full set of chromosomes in each cell O DNA that circulates freely in your body O heritable traits explained by regulation of gene expression O genes found outside of the nucleus

Which of the following are true statements about chromosomes Please choose all that apply Homologous chromosomes are assigned the same chromosome number Homologous chromosomes must have the exact same alleles as each other Homologous chromosomes have the same types of genes as each other Homologous chromosomes are often very different lengths from each other

Which of the following processes produces the most ATP O citric acid cycle O glycolysis O aerobic respiration oxidative phosphorylation O fermentation

Cell cycle checkpoints that check for the quality of the DNA would most likely be active O before cytokinesis O during G1 O during metaphase O after S phase during G2

PURPOSE The purpose ito observe th growth and Identify the Colonization EXPECTED RESULTS 1 In the environments you sampled which will have the greatest amount of growth on the nutrient agar plates H has the greates amount of growth 2 Do you expect turbidity in the unsterilized nutrient broth that was incubated 3 Will nutrient broth or nutrient agar provide more information on the variety of bacteria in an environment RESULTS Fill in the following table with descriptions of the bacterial colonies on your plates and your classmates plates Use a separate line for each different appearing colony Area sampled Incubated at 32 C for 1 days Colony Description Estimated Diameter Whole Colony Appearance 2cm colony undulate Margin Elevation Pigment Convex y ellow Number of This Type

Move the terms into the correct empty boxes to complete the concept map anaphylaxis allergic reactions Ilver toxicity drug is seen as antigen affects multiple organs kidneys hepatotoxicity microbiola disruption develop when Adverse Drug Effects symptoms arise and include Enter your search term on second exposure superinfection thrush nephrotoxicity enhanced by broad spectrum drugs may result in a such as

Gillian and Eduardo had a baby girl they named Ava Frank insists that he is Ava s father and asks for blood tests to confirm The results are as follows Gillian Type AB Eduardo Type O Frank Type B Ava baby Type AB Who is Ava s father and why O Eduardo is Ava s father because Ava would get her blood type from her mother O Eduardo is Ava s father because he can give a recessive O allele to his child O Both men could still be the father because Ava would get her blood type from her mother O Frank is Ava s father because he can give the B allele to his child O Frank is Ava s father because he can give a recessive O allele to his child

10 What is the life stage called 11 Give the scientific name of the most pathogenic species associated with this infection

Explain how mitochondrial dysfunction affects people with down syndrome

Which of the following cellular connections easily allows small molecules to travel from one cell to another Otight junctions O integrins O desmosomes O gap junctions

Nutrient broth Area sampled tube Growth present Turbidity present Flocculent present Sediment present Trypic Soy Broths Pellicle present Color 1 2 Microbes in the Environment Incubated at 32 3 Not Sterilized Broth CONCLUSIONS 1 Do the results you obtained agree with your expected results Sterilized Broth Not Inoculated 3 Explain any growth in the sterilized and not sterilized broths 4 Which environment has the most total bacteria the differences in total bacteria in these two places 5 Which environment has the most different bacteria Yes NO NO Yes NO yellow 2 What is the minimum number of different bacteria present on one of your plates How do you know C for The least The least Inoculated Broth days Laler Provide a reason for Provide a reason

The promoter region upstream of a gene provides a binding site for DNA polymerase RNA polymerase telomerase methyl groups a repressor protein