Biology Questions

EXERCISE Fill in the blank 1 DNA replication takes place during the 2 The enzyme primase builds short RNA segments called polymerase can build the complementary strand of DNA 3 Because DNA synthesis proceeds in the 5 to 3 direction the pieces called Okazaki fragments Respond to the following based on your reading portion of the cell cycle 5 required before DNA is replicated in short 4 What s DNA replication and why is it an important part of cell division 5 Explain what semiconservative DNA replication is and how it is different from conservative and dispersive models of DNA replication 6 Name the five major enzymes involved in DNA replication and briefly explain their roles in the process 7 Discuss the differences between eukaryotic and prokaryotic cell division and DNA replication 1 DNA replication takes place during the interphase portion of the cell cycle 2 The enzyme primase builds short RNA segments called primers required before DNA polymerase can build the complementary strand of DNA 3 Because DNA synthesis proceeds in the 5 to 3 direction the lagging strand is replicated in short pieces called Okazaki fragments 4 DNA replication is the process by which a molecule of DNA is duplicated to produce two identical DNA molecules Which accompanies cell division because any time a cell divides an entire copy of the organism s DNA must be made to ensure that the daughter cells have identical DNA as the rest of the body s cells Without DNA replication some daughter cells would not contain DNA and not be able to further divide DNA replication is essential for the cell growth cell repair and reproduction in organisms

Which structure of the leaf allows the plant to evaporate water thus cooling the plant in the heat xylem tissue Ostomata Ocuticle epidermis

Catabolic pathways break down large molecules into smaller one All of the above are correct Catabolism releases energy O Can be considered to be downhill reactions Cellular respiration would be an example of catabolism

5 The hydrologic cycle would be affected by a warming climate because A increased numbers of cloud would reduce sunlight B evaporation of water from the ocean would decrease Csnow melt will occur earlier in the year D evaporation would result in less water in the hydrologic cycle

Select the correct answer from each drop down menu A scientist observes changes in a population of slow moving animals over time She hypothesizes that the population may be decreasin To test her hypothesis she will analyze the population using the method She finds that the population of this species is significantly decreasing If this trend does not change this species could become

1 The following gel was produced in manual DNA sequencing What would the unknown DNA template be that this gel represents 4T ddCTP ddGTP ddTTP ddATP

In using which of the following lenses should the diaphragm be almost completely open to maximize resolution O A oil immersion O B low power OC high dry

no heat is used and Stain doesn t enter the is more Precise than a direct Stain 2 Why were you instructed to discard the toothpick in disinfectant CRITICAL THINKING 1 What microscopic technique gives a field similar in appearance to that seen in the negative stain 2 Carbolfuchsin can be used as a direct stain and as a negative stain As a direct stain the pH is 3 Unlike nigrosin acidic Congo red does not contain suspended particles but it can give the appearance of a negative stain What is the basis for this stain CLINICAL APPLICATION Treponema denticola is easily missed in a direct stain of a tooth or gum scraping because the cells are distorted by the staining procedure Why can this bacterium be seen with negative staining ART CREDITS All ill hu Pracision Graphics unless otherwise noted

Multiple Choice O O O O is the liquid portion of blood in which blood cells are suspended is mostly water contains albumin and globulins contains fibrinogen All of the choices are correct

ag the descriptions or Images to the correct category to demonstrate your understanding of the major infections caused by athogenic protozoans Giardia Vaginal infection Plasmodium Toxoplasma gondii Balantidium coli Brain infection Amoebic dysentery Malana Sporozoa Flagellated Protozoans Sarcodina Ciliated Protozoans

2001 PURPOSE The purpose of generating a smear is to adhere the bacteria to the slide and avoid the sample From being degraded during the Staining procedure EXPECTED RESULTS 1 Sketch a coccus 0 3 Which species used in this exercise is a bacillus 2 Sketch a bacillus RESULTS Sketch a few bacteria viewed with the oil immersion objective lens Bacterium Total magnification Morphology shape Arrangement of cells relative to one another bluzor 8 Staphylococcus epidermidis 1000 Spherical Arranged in clusters 402 000 66 00 0 00000 0 00 002 200 Gram Postive red Color 2 Bacillus megaterium 1000 x Rod Shaped Arranged as a circular Colony

2 Which bacterium is larger Bacillus megaterium QUESTIONS 1 Of what value is a simple stain A Simple Stain is a dye utilized to Stain the cells which will help us to visualize cell shapes and structures 2 What is the purpose of heat fixing the smear The bacteria will be killed by heat staining and will stick to the slide This aids in the proper absorption of the stair resulting in proper visibility under the microscope 3 Another method of fixing smears is to use methanol instead of heat How does alcohol chemically fix the bacteria Methanol is used to adhere the specimen to the Spide Fixing the specimen will keep it from being washed away while staining Using methanol to Fix the liquid Specimen will prevent it from being washed away 4 In heat fixing what would happen if too much heat were applied during Staining It is an effective way reparin discolored hea 7 The marphology of the specimen may alter if too much heat than us is given to it and the specimen may become rapidily CRITICAL THINKING 1 Methylene blue can be prepared as a basic stain or an acidic stain How would the pH of the stain affect the staining of bacteria The pH will determine whether or not the bacteria will have a specific charge 2 Can dyes other than methylene blue be used for direct staining Briefly explain

1 Why is the size more accurate in a negative stain than in a direct stain It is because no heat is used and Stain doesn t enter the Cell the negative Stain is more Precise than a direct Stain 2 Why were you instructed to discard the toothpick in disinfectant To prevent bacterial Contamination CRITICAL THINKING 1 What microscopic technique gives a field similar in appearance to that seen in the negative stain Dark Field technique gives a Field Similar in appearence 2 Carbolfuchsin can be used as a direct stain and as a negative stain As a direct stain the pH is Basic 3 Unlike nigrosin acidic Congo red does not contain suspended particles but it can give the appearance of a negative stain What is the basis for this stain They are negativey charged

hosphorous is an important component in which of the following O A ATP B DNA OC both A and B D neither A nor B

Lymphocyte maturation involves Multiple Choice O O O O hormonal signals that initiate development B cells maturing in bone marrow sites T cells maturing in the thymus release of mature lymphocytes to begin migration to various lymphoid organs All of the choices are correct

Total PURPOSE The Purrose of Gram Staining is for identifying and Clasifying Gram stain enables gram Positive or gram negative bacteria for example to Clasify bacteria as either EXPECTED RESULTS Bacterium Color Gram Staining red 1 What color will a gram negative cell stain 2 What color will a grand positive cell stain Rurple 3 Which organism used in this exercise is a coccus Sta Phylococus epidermis magnification Morphology and arrangement RESULTS Sketch a few bacteria viewed with the oil immersion objective lens gram negative Staphylococcus epidermidis DE 1000 x Cocci red red Bacillus subtilis Ce gram Positive Escherichia coli 1000x bacili Purple 2 Did your results agree with the information in your text QUESTIONS 1 Why do gram positive cells more than 24 hours old stain gram negative 2 Can iodine be added before the primary stain in a Gram stain 3 List the steps of the Gram ataining procedure in order omit washings and fill in the color of gram positive cells and gram negative cells after each step Step 1 2 3 4 Chemical Gram Positive Cells Appearance Gram Negative Cells 4 Which step can you omit without affecting determination of the Gram reaction CRITICAL THINKING 1 Suppose you performed a Gram stain on a sample from a pure culture of bacteria and observed a field of red and purple cocci Adjacent cells were not always the same color What would you conclude 2 Suppose you are viewing a Gram stained field of red rods and purple cocci through the microscope What do you conclude

O8 https ezto mheducation com ext map index html con con external browser 0 launch Url https 253A 2 mework i External structure for attachment to surfaces Allows for greater pathogenicity because it blocks phagocytosis by white blood cells Provides motility Hollow tube involved in conjugation Common target for antibiotics due to a different Only found in gram negative bacteria Often carry genes of antibiotic resistance and can be passed from one cell to another Contains the genetic material of the cell Structure is differentiated by Gram stain procedure MI Prev Saved 21 of 33 Next Help External stru for attachme surfaces Contains the genetic material c the cell Often carry genes of antibiotic resistance

Ih which area of the diagram is most of Earth s phosphorus stor CVDL X O A W B X Phosphorous Cycle W Runoff Sediment Guano Mining Rock weathering Organic animal wastes Z Decomposers Y Land formation

LABORATORY REPORT Gram Staining PURPOSE The Purpose of Gram Staining is for identifying and clasifying bacteria for example Grom stain enables to bacteria as either gram Positive or gram negalive EXPECTED RESULTS red 1 What color will a gram negative cell stain red 2 What color will a grand Positive cell stain Purple 3 Which organism used in this exercise is a coccus Staphylococus epilkimis RESULTS Sketch a few bacteria viewed with the oil immersion objective lens gram negative Bacterium Total magnification Color Morphology and arrangement Short Gram reaction Staphylococcus epidermidis 1000 x Cocci red Negative Bacillus subtilis gram Positive Escherichia coli 1000x bacili Purple Positive 2 Did your results agree with the infor yes my results agree with the information QUESTIONS 1 Why do gram positive cells more than 24 hours old stain gram negative It is because Wall begins to degenerate af 24 hours 2 Can iodine be added before the primary stain in a Gram stain No It should not be added in because it s a Fixativeagent Crystal 3 List the steps of the Gram staining procedure in order omit washings and fill in the color of gram positive cells and gram negative cells after each step Step 1 2 3 4 Chemical Primary tain Cryskil videt Mordant Grams lodine Decolourizer Ethyl Alcohol Secondary Stain Gram Positive Cells Purple Purple Purple Purple the Appearance Gram Negative Cells Purple Purple Colorless 4 Which step can you omit without affecting determination of the Gram reaction Any step can be omitted All the steps play an important role too Prevent contamination CRITICAL THINKING 1 Suppose you performed a Gram stain on a sample from a pure culture of bacteria and observed a field of red and purple cocci Adjacent cells were not always the same color What would you conclude 2 Suppose you are viewing a Gram stained field of red rods and purple cocci through the microscope What do you conclude

Reagan uses the context clue of synonym when talking about coercion in the highlighted portion from section 10 of A Time for Choosing What is the synonym for coercion within this passage A force B government C purpose D achieve

an introductory transitional phrase A Furthermore like other poets Aleksandr Solzhenitsyn speaks and writes in a different language B Furthermore like other poets Aleksandr Solzhenitsyn speaks and writes in a different language C Furthermore like other poets Aleksandr Solzhenitsyn speaks and writes in a different language D Furthermore like other poets Aleksandr Solzhenitsyn speaks 2

The percentage of blo ejected from the ventricles in a single contraction is called

Question 14 of 25 Which comparison of bacteria and viruses supports the claim that bacteria are living organisms while viruses are not OA Both bacteria and viruses transfer DNA to other organisms B Only bacteria are able to reproduce without a host cell C Only viruses can have either DNA or RNA OD Both bacteria and viruses contain genetic material SUBMIT

Question 89 of 103 Which of the following statements is NOT true about RNA synthesis A Purines can only hydrogen bond to pyrimidines B Adenine forms two hydrogen bonds to uracil C Cytosine forms three hydrogen bonds to thymine D The sugar phosphate backbone forms the structural framework of RNA

External structure for attachment to surfaces Allows for greater pathogenicity because it blocks phagocytosis by white blood cells Provides motility Hollow tube involved in conjugation Common target Only found in gram negative bacteria Often carry genes of antibiotic resistance and can be passed from one cell to another Contains the genetic material of the cell Structure is differentiated by Gram stain procedure Prev Saved 21 of 33 HE Next

The amount of blood ejected from the ventricles in one minute is called The percentage of blood ejected from the ventricles in a single alled

List and explain 3 Homeostasis problems in Down syndrome

punctuation of an introductory 2 transitional phrase A As we have seen before Shakespeare speaks of summer in Shall I Compare Thee to a Summer s Day B As we have seen before Shakespeare speaks of summer in Shall I Compare Thee to a Summer s Day C As we have seen before Shakespeare speaks of summer in Shall I Compare Thee to a Summer s Day D As we have seen before Shakespeare Help Resources

Which of the following is an absolute modifier A big B large C small D immortal

Which sentence below correctly punctuates the quote A In O Captain My Captain Whitman writes he has no pulse nor will B In O Captain My Captain Whitman writes he has no pulse nor will C In O Captain My Captain Whitman writes he has no pulse nor will D In O Captain My Captain Whitman writes he has no rill

Which sentence below correctly punctuates the quote A Whitman says For you they call to describe Abraham Lincoln B Whitman says For you they call to describe Abraham Lincoln C Whitman says For you they call to describe Abraham Lincoln D Whitman says For you they call to describe Abraham Lincoln

I woke up early for work I went to bed early A I woke up early for work therefore I went to bed early B I woke up early for work therefore I went to bed early C I woke up early for work therefore I went to bed early D I woke up early for work therefore I went to hed early

underlined word incorrectly A I only get minimal exercise in a day even though I should get more B After a long time of questionable choices I finally started to make mature decisions C I expect you to inspect your notes before you take your test tomorrow D I like to take a m nimal pill everyday to make sure I am healthy Academic Vocabulary X inspect v to examine to study to scrutinize E g The manager would like to inspect our work before we move on to the next step minimal adj least or smallest amount negligible E g We were disappointed at the minimal effort the team made to win the game mature adj grown up responsible stable established settled aged ripe Eloff chowed that he was mature enough to drive

Which of the following lines of Shakespeare s Sonnet 18 has reverse word order A Shall I compare thee to a Summer s day B Sometime too hot the eye of heaven shines C So long as men can breathe or eyes can see D Thou art more lovely and more temperate Shall I Compare Thee to a Summer s Day Sonnet 18 by William Shakespeare 1 Shall I compare thee to a Summer s day Thou art more lovely and more temperate winds do chake the darling buds of May

2 a What challenges can force societies to reconsider liberalism

Which sentence uses the underlined word incorrectly A Her response to the criticism was mature she flew into a rage B We can finish the project in a minimal amount of time leaving the rest of the day free C I ve learned to inspect my papers carefully for spelling errors before turning them in D The student acted incredibly mature she worked hard regardless of the stress she felt Academic Vocabulary X muamine to study to scrutinize

Which sentence below correctly punctuates the quote A For you they call refers to the people s love for Abraham Lincoln B For you they call refers to the people s love for Abraham Lincoln C For you they call refers to the people s love for Abraham Lincoln D For you they call refers to the people s love for Abraham Lincoln

which vocabulary word has the following origin from Middle French artigiano meaning craft A painter B sculptor C artisan D amazed

Which of the following is the definition of a couplet A a pair of successive lines of verse that rhyme and are of the same length B a stressed and unstressed syllable pattern in a verse C a meter that contains one stressed syllable and at least one unstressed syllable D a line in verse or poetry that has five strong metrical feet or beats Shall I Compare Thee to a Summer s Day Sonnet 18 by William Shakespeare 1 Shall I compare thee to a Summer s day Thou art more lovely and more temperate

slushy sand A repetition repeated words B assonance repeated vowel sounds C onomatopoeia words that imitate sounds D alliteration repeated beginning sounds Meeting at Night by Robert Browning The gray sea and the long black land And the yellow half moon large and low And the startled little waves that leap In fiery ringlets from their sleep As I gain the cove with pushing prow And quench its speed i the slushy sand 17 Then a mile of warm sea scented beach Three fields to cross till a farm appears A tap at the pane the quick sharp scratch And blue spurt of a lighted match And a voice less loud through joys and fears Than the two hearts beating each to each

Which of these lines from Whitman s O Captain My Captain includes an internal rhyme A The ship is anchored safe and sound its voyage closed and done B The ship has weathered every rack the prize we sought is won C From fearful trip the victor ship comes in with object won D This arm beneath your head O Captain My Captain Walt Whitman O Captain my Captain our fearful trip is done The ship has weather d every rack the prize we sought

complete the following sentence This was I have ever seen him behave in the face of not getting his way A the maturest B more maturer than C the most maturest D the maturer

underlined word incorrectly A I spend a minimal amount of money on fast food B This neighborhood is more mature and put together than the one I grew up in C The police inspect luggage before it is loaded into an airplane D I found a huge black inspect my the wall of my office today Academic Vocabulary X inspect v to examine to study to scrutinize E g The manager would like to inspect our work before we move on to the next step minimal adj least or smallest amount negligible E g We were disappointed at the minimal effort the team made to win the game mature VW adj grown un responsibl

Which sentence below uses an incorrect homophone A When I work out my waist gets smaller B We try to recycle to produce less waste C It is such a waist to put in all that work and not finish the project D Don t waste your time being unproductive

What extended metaphor does Frost use throughout his poem A Frost compares a patch of old snow to the rain B Frost compares a patch of old snow to happiness C Frost compares a patch of old snow to a newspaper D Frost compares a patch of old snow to sleep

Select the proper form of the word to complete the following sentence The impending deluge was than even the weatherman had realized A inevitabler B more inevitable C the most inevitable D inevitablest

Which substance will be most soluble in water O CO ONH3

Classify NaOH as a nonelectrolyte weak electrolyte or strong electrolyte Classify NH3 as a nonelectrolyte weak electrolyte or strong electrolyte N Classify HCI as a nonelectrolyte weak electrolyte or strong electrolyte P Classify C6H12O6 as a nonelectrolyte weak electrolyte or strong electrolyte

What is the mass in grams of 2 44 Liters of solution with density equal to 1 38 g ml 3 37 3370 1 77 1770 0 566

5 7 32 8 10 12 6 14 2 S 8 16 15 14 13 Which of the structures in the eye diagram above transmits information from the retina to the brain 12 11 10