Biology Questions

ese possible hypotheses about stars in our universe as falsifiable or non falsifiable Millions of shining stars make the night sky incredibly beautiful The Sun is the most important star in the universe Falsifiable Stars are formed from enormous clouds made mainly of hydrogen and helium The twinkling of stars is an illusion that results from the stars radiation passing through Earth s atmosphere Non Falsifiable

Homework https ezto mheducation com ext map index html con con external browser 0 launchUrl https RNA primers are removed through enzymatic action to make two complete strands of DNA DNA is unwound at the A T rich origin of replication Helicases break the hydrogen bonds between the base pairs to unzip the helix Primase begins the new strands and DNA polymerase Ill adds nucleotides Single stranded binding proteins keep the strands separated Topoisomerases Overall direction of replication RNA primase ONA ANA DNA ge Saved Helicase Single strand binding proteins ONA polymera 3 5 1 2

The phylum of the worm shown above is Select rectangle is Select Select spicule scolex The structure encased by the

Drag the terms on the left to correctly complete these sentences Not all the terms will be used View Available Hint s centrosome s centromere s kinetochore s chromosome s sister chromatid s cytokinesis interphase mitotic spindle s chromatin 1 DNA replication produces two identical DNA molecules called mitosis 2 After chromosomes condense the are most tightly attached to each other 3 During mitosis microtubules attach to chromosomes at the 4 In dividing cells most of the cell s growth occurs during 5 The and plays a role in cell division is the region where the identical DNA molecules Reset Help 8 The during mitosis which separate during is a cell structure consisting of microtubules which forms during early mitosis 7 In most eukaryotes division of the nucleus is followed by divides 6 During interphase most of the nucleus is filled with a complex of DNA and protein in a dispersed form called when the rest of the cell are the organizing centers for microtubules involved in separating chromosomes

The diagram below shows a bacterial replication fork and its principal proteins Drag the labels to their appropriate locations in the diagram to describe the name or function of each structure View Available Hint Coats single stranded DNA Breaks hydrogen bonds unwinding DNA double helix Synthesizes RNA primers on leading and lagging strands Synthesizes DNA 5 to 3 on leading and lagging strands Replaces RNA primers with DNA nucleotides Catalyzes phosphodiester bond formation joining DNA fragments Relaxes supercolled DNA Leading strand Lagging strand Group 1 Group 1 Group 1 Group 1 Group 2 Group 1 Group 1 Group 1 Overall direction of synthesis Group 2 Reset Help

Mitosis 2 of 3 Mechanism of Mitosis BioFlix tutorial Part A Identifying the stages of mitosis The stages of mitosis were originally defined by cellular features observable through a light microscope The six micrographs below show animal cells lung cells from a newt during the five stages of mitosis plus cytokinesis Note that interphase is not represented in these micrographs In these images the chromosomes have been stained blue microtubules green and microfilaments red Drag each micrograph to the target that indicates the stage of mitosis or cytokinesis shows View Available Hint s prophase prometaphase metaphase anaphase telophase Reset cytokinesis 3 of 10 Help

he diagram below shows a bacterial replication fork and its principal proteins rag the labels to their appropriate locations in the diagram to describe the name or function of each structure View Available Hint s Breaks hydrogen bonds unwinding DNA double helix e Relaxes supercoiled DNA Synthesizes RNA primers on leading and lagging strands Coats single stranded DNA Replaces RNA primers with DNA nucleotides Lagging strand Synthesizes DNA 5 to 3 on leading and lagging strands Reset Catalyzes phosphodiester bond formation joining DNA fragments Overall direction of synthesis Leading strand Help

As the chromosomes of a parent cell are duplicated and distributed to the two daughter cells during cell division the structure of the chromosomes changes Answer the three questions for each phase of the cell cycle by dragging the yes and no labels to the appropriate locations in the table Note Assume that by the end of the M phase the parent cell has not yet divided to form two daughter cells View Available Hint s yes no Changes in DNA structure during the cell cycle Submit Question 1 Are sister chromatids present in all or part of this phase 2 Is the DNA condensed in all or part of this phase 3 Does the cell contain twice as much DNA in this phase as it did in the G phase Previous Answers X Incorrect Try Again One attempt remaining G no no no S G Beginning of M prophase early anaphase Reset End of M late anaphase telophase Help tion 1 rocall that once sister chromatids separate from each other each chromatid becomes a full fledged chromosome Knowing this are sister

Part B Phases of the cell cycle The cell cycle represents the coordinated sequence of events in the life of a cell from its formation to its division into two daughter cells Most of the key events of the cell cycle are restricted to a specific time within the cycle In this exercise you will identify when various events occur during the cell cycle Recall that interphase consists of the G S and G subphases and that the M phase consists of mitosis and cytokinesis Drag each label to the appropriate target View Available Hint s Non dividing cells exit cell cycle Cell divides forming two daughter cells M checkpoint Mitotic spindle begins to form G checkpoint G G checkpoint At this point cell commits to go through the cycle d Two centrosomes have formed Adapted from Biology by Campbell and Reece 2008 Pearson Education Inc Reset DNA replicates Help

Chapter 09 Homework Mitosis 1 of 3 Mitosis and the Cell Cycle BioFlix tutorial The cell cycle represents the coordinated sequence of events in the life of a cell from its formation to its division into two daughter cells Most of the key events of the cell cycle are restricted to a spe time within the cycle In this exercise you will identify when various events occur during the cell cycle Recall that interphase consists of the G S and G subphases and that the M phase consists mitosis and cytokinesis Drag each label to the appropriate target View Available Hint s Two centrosomes have formed Cell divides forming two daughter cells At this point cell commits to go through the cycle Mitotic spindle begins to form DNA replicates Non dividing cells exit cell cycle f G checkpoint M checkpoint G G G checkpoint 6 Adapted from Biology by Campbell and Reece 2008 Pearson Education Inc 2 of 10 Reset Help

02 42 27 Question 43 of 60 A woman bought acreage in a distant county never went to see the acreage and did not use the grounds A man moved his mobile home onto the land had a water well drilled and lived there for 22 years The man may become the owner of the land if he has complied with the state law regarding OA adverse possession OB prescriptive easement C requirements for a valid conveyance OD voluntary alienation

Who was Prime Minister of Britain during Operation Sea Lion A Neville Chamberlain B King George VI C Winston Churchill D Clement Attlee

2 Book Ferences Fatigue COVID 19 exhibited a long list of possible signs and symptoms as scientists were learning about the disease Classify each item as a sign or a symptom Dry cough Labored breathing Headache Loss of taste or smell Body aches Fover Signs Symptoms Help Next Save E

Media Turbidity Mixed culture broth subculturing Aseptic transfer techniques agar slant Nutrients used to grow bacteria in the laboratory cloudiness in the medium inoculated with bacteria transfer microbes from one medium to another one Methods devised to prevent contaminating microbes from entering our Solid media in a test tube with an inclined surface liquid medium The sampling of a bacterial culture Two or more species of bacteria growing in the same medium Choose Two or more species of ba Choose Choose Choose1

1 DNA replicates in a mode 2 In the DNA given below which is the coding strand and which is the template strand What is the difference between the two 3 6 I 5 3 List all the enzymes involved in DNA replication and briefly mention their 4 Differentiate between transcription in Eukaryotes and prokaryotes 5 The scientists who pointed out for the first time that DNA is the genetic material are Hershey and Chase and 5 3 experiment They used Why How did their experiment show that DNA is the genetic material They use bacteriophage to conduct their to differentiate between protein and DNA

7 The same bacteria are now grown in a rich media which contains both glucose and lactose What source of sugar will the bacteria use How will the bacteria stop lac operon from turning on even in the presence of lactose

Which of the following happened as a result of the Government of India Act of 1858 A Mongol Invasion B Great Famine C the death of Buddha D Sepoy Rebellion

Fill in the blank What is the correct sequence of stages in the life cycle of the Chinese liver fluke To answer write the numbers with a space in between e g 1234567 1 adult 2 egg 3 metacercariae 4 miracidium 5 cercariae

What CLASS would you find this animal A B D C

Match the letter to the correct structure A A B D 60 000 C B M C Choose nucleus of the flame cell tubule of flame cell flame cell cilia of flame cell nephrostome of flame cell nephridiopore of flame cell intake slits of flame cell

4 points Match the following structure to the correct structure Ganglion neurons 53 Endodermal epithelial cell 54 Cilia Gland cell 55 56 www 55 Dana Ve 54 53 56 Choose epitheliomuscular cell nerve cell muscle cell nematocyst gland cell mesoglea nutritive cell cnidocyte mesohyl

Using this figure identify the structure at letter C A C B

Which type of cells have mitochondria O plant cells O animal cells O yeast cells O plant animal and yeast cells O prokaryotic cells

Using this picture fill in the structure at letter B Flow chart for movement of water in sponge canal system Ostium in Porocyte A Prosopyle B 35 C 35 Excurrent canal D Osculum Outside the body

What kind of appendages are these

Using this picture identify the region at letter A N C A B wwww

D Opportunistic fungal pathogens C 9 Candida albicans 1000x C 2 How do mold spores differ from bacterial endospores Pneumocystis carinii demo 400x or 1000x Questions 1 Why are antibiotics added to media that are designed for growing fungi e g Sabouraud s agar Antibiotics Prevent the growth of bacteria which would be a contaminant in a Fungal culture 3 Pathogenic bacteria are routinely cultured in clinical and research microbiology laboratories where pathogenic fungi are rarely cultured Why is this so 4 Compare and contrast the microscopic appearance of C albicans and T mentagrophytes 5 Compare the geographic distributions of C neoformans H capsulatum and C immitis

Which of the cells in this image shows type O blood Anti A Anti B Anti B Anti A 0 1 02 3 04 B B A 2 3

Technique 3 1 Event Event Production of Production of viable sperm viable oocytes Transport down the male duct system Sperm deposited in the female vagina Sperm move Transport through the down the female s repro uterine tube ductive tract Ovulation Meeting of sperm and oocyte in uterine tube Capture of the oocyte by the uterine tube Union of sperm and egg Implantation of blastocyst in properly prepared endometrium O birth control pill O tubal ligation O diaphragm morning after pill Birth 2 4 5 6 Which birth control method acts at 2 above 7 8 Technique

1 Inhibition of cell wall synthesis penicillins cephalosporins bacitracin vancomycin Replication DNA Transcription 3 Inhibition of nucleic acid replication and transcription quinolones rifampin mRNA 2 Inhibition of protein synthesis chloramphenicol erythromycin tetracyclines streptomycin Translation 4 Injury to plasma membrane polymyxin B Enzyme Protein Enzyme activity inhibition 5 Inhibition of essential metabolite synthesis sulfanilamide trimethoprim KEY CONCEPTS Antimicrobial drugs target certain essential functions of the microbe Mechanisms of action include inhibiting cell wall synthesis inhibiting protein synthesis inhibiting nucleic acid synthesis injuring the plasma

Spectrum of Antimicrobial Activity Treatment with broad spectrum antimicrobials can lead to superinfections Superinfection overgrowth of normal microbiota that is resistant to antimicrobials 1 Normal microbiota keeps opportunistic pathogens in check pathogen M 00 2 Broad spectrum antibiotics kill nonresistant cells 3 Drug resistant pathogens proliferate and can cause a superinfection

What is happening in this image O Normal oxygen transport O Allergic reaction O Blood clot is forming O None of these

10 Structure 2 Structure 3 Structure 6 12 11 13 Structure 11 14 15 B 16 17 www Peroxisome Centrioles Nucleus Choose Rough Endoplasmic Reticulur Golgi apparatus Choose AL Choose y

Use this figure to answer the questions below 3 5 2 Structure 2 O Structure 4 What structure number in the picture above contains the visual area O Structure 5 O Structure 8 6 O Structure 10 13 12 11 10 9 8

A method for the disinfection of milk that allows it to retain its palatability is O ultraviolet light pasteurization O tyndallization putooloving

hen a person is prescribed an antibiotic for a bacterial illness but they stop taking the antibiotic before they finish it what population of bacteria remain in their be the ones most sensitive to the antibiotic the ones most resistant to the antibiotic a mixture of the ones most sensitive and resistant to the antibiotic there is no way to predict ones that will remain all of these

The transfer of genetic material between bacteria in direct physical contact is called transformation transduction conjugation all of these

This open area is the O Oral cavity Nasal cavity O Oropharynx O Laryngopharynx

B A positively B negatively C neutral This painting is titled Louis XVIII lifting France from her ruins How do you think the artist felt about the legitimacy of European monarchies

Examine this painting of the Grand Army s Retreat from Moscow Which term best fits the mood of the image A gracious B celebratory C defeated D reverent

5 Give the scientific name 6 What type of sample is this slide made from

Draw the colonies that appear on each agar plate Colony description Form Elevation Pigmentation Size Spread Plate Technique Draw the distribution of growth on the slant surface Coccus Flut 0 5 micrometer Size 0 5 0 8micrometer Number of Colonies 97 Type of growth Pigmentation Name of organism PART B Isolation of Pure Cultures from a Spread Plate or Streak Plate Preparation Streak Plate Technique gggg CFU CFU X DE ML ML Plated 97X 105 106 107 X 0 1 Volume plated G 0 ervation Fra 30

The following question refers to the generalized life cycle for land plants shown in the figure Each number within a circle or square represents a specific plant or plant part and each number over an arrow represents meiosis mitosis or fertilization 2n C binary fission D mitosis 0000 In the figure the process labeled 6 involves OA fertilization OB meiosis e

Part A Fill in the blanks of the following paragraph Match the numbers in the left column to the appropriate blanks in the sentence on the right Not all numbers will be used Submit 3 Provide Feedback 6 9 12 18 36 Request Answer Reset Help To synthesize one glucose molecule the Calvin cycle uses molecules of molecules CO of ATP and molecules of NADPH

Chlorophyll can be found in D O O B Submit B and E A and C B and D B and C A and B Previous Answers Request Answer X Incorrect Try Again One attempt remaining This choice is partially correct

Part A Light H O Light Reactions Qubmit NADP ADR NADPH CO Calvin Cycle Select the correct statement about the Calvin cycle Request Answer CH O sugar The Calvin cycle has three phases carbon fixation reduction and regeneration of RuBP The basic function of the Calvin cycle is the conversion of solar energy to chemical energy The Calvin cycle takes place primarily in the dark

Part Redox reactions of photosynthesis In photosynthesis a redox compound that is produced in the light reactions is required to drive other redox reactions in the Calvin cycle as shown in this figure along with other components of photosynthesis H O co chloroplast Light reactions NADP NADPH ATP Drag the terms to the appropriate blanks to complete the following sentences summarizing the redox reactions of photosynthesis Terms may be used once more than once or not at all View Available Hint s ADP H O CO 0 NADP ADP 6 CH ATP two NADPH Calvin cycle G3P sugar 1 In the light reactions light energy is used to oxidize to Reset Help 2 The electrons derived from this oxidation reaction in the light reactions are used to reduce 3 The Calvin cycle oxidizes the light reactions product to to 4 The electrons derived from this oxidation reaction in the Calvin cycle are used to

A D splits water into 1 2 0 H and e D B C Em B C E

Part D Chloroplast structure and function In eukaryotes all the reactions of photosynthesis occur in various membranes and compartments of the chloroplast Identify the membranes or compartments of the chloroplast by dragging the blue labels to the blue targets Then identify where the light reactions and Calvin cycle occur by dragging the pink labels to the pink targets View Available Hint s envelope membranes thylakoid membrane thylakoid space cytosol stroma location of light reactions location of Calvin cycle Group 1 Group 2 Group 1 Group 1 Cress Group 2 Group 1 Group 1 Reset Help

Part D Energized electrons from A D B D C E E C are used to reduce NADP