Biomolecules Questions and Answers

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Which of the following are examples of tracheophytes Select all that apply 1 liverworts 2 oak trees 3 horsetails 4 ferns 5 conifers 6 mosses

Why did the dinosaurs become extinct O Cycads and other gymnosperms upon which herbivorous dinosaurs fed declined and the dinosaurs were unable to digest the angiosperms that arose in their place 1 02 The changing climate caused the evolution of most dinosaur species into the existing bird mammal and reptile species that exist today 3 The pollen produced by the rise in flowering plants produced allergenic responses in dinosaurs and interfered with their ability to communicate with potential mates 4 Increasing carbon dioxide levels produced climates too hot for the incubation of their eggs 5 A meteorite or comet crashed into the Earth causing smoke and ash that blocked the sun and caused death of the plants that were food for herbivorous dinosaurs

Moss sperm are produced in O 1 lycophylls O2 archegonia O 3 stomata 4 sporophytes 5 antheridia

Liang and Mahadevan concluded that flowers bloom as a result of O 1 growth starting at the midrib running along the center of each petal O2 differential growth rates of top and bottom petal surfaces O3 differential growth rates in stems 4 greater growth on petal edges than in the petal center

Male gametophytes are produced by which of the following processes O 1 mitosis 2 meiosis O 3 microsporophyte generation O 4 neither mitosis nor meiosis

One difference between sieve tube cells and vessels is that sieve tube cells are but vessels are dead 1 alive 2 hollow 3 more spherical O 4 placed end to end

Select all of the following that are types of roots Check all that appl 1 adventurous 2 fibrous 3 buttress

How are group behaviors different from individual behaviors O A Group behaviors are seen only in complex organisms while individual behaviors are seen only in simple organisms OB Group behaviors are always less beneficial than individual behaviors OC Only group behaviors involve multiple organisms cooperating for mutual benefit D Group behaviors increase the chances of the group surviving but individual organisms do not benefit

A zone of inhibition is a an area of a plate that where antibiotics are not effective against bacteri b an area of a plate where bacterial growth is not observed c an area of a plate that was not inoculated d an area of a plate where bacteria gmuur di

The McFarland standard is used to a analyze the density of growth on a Mueller Hinton agar pl Ob determine the cell density of an inoculum precisely generate a standardized inoculum of a specific cell dennit

If you observed a 17 mm zone of inhibition on a Mueller Hinton agar plate of Staphylococcus around a 15 microgram ug dose of Erythomycin how would you classify the antibiotic sensitivity Tablel Zone diameter interpretative standards for Staphylococcus species Drug name Diameter Dose strength Penicillin G 10 g Oxacillin lug Erythromycin 15pg Gentamycin 10 g Tobramycin 10 g Resistant mm or less 528 10 13 12 12 Zone mm Intermediate mm or less 11 12 14 22 13 14 13 14 Susceptible mm or more 229 213 223 215 215

Arabidopsis plants with a mutation in the flp1 gene produce pollen grains that have a smooth surface and are easily damaged Disruption of what process likely causes this phenotype 1 sporopollenin deposition O2 double fertilization 3 pollen germination 4 tube cell formation

Blue sharks can be found at different locations in the Atlantic Ocean at different times of year as shown on the map below Mating grounds Pupping grounds This is evidence of which type of behavior A Herding B Schooling C Migration D Cooperative hunting

Biochemical Test Catalase Oxidase Purpose To determine if the bacteria have the catalase enzyme How the test is done Bacteria added to glass slide and drop of H 0 is added Substrate H 0

B Use the diagram below to start of replication The DNA Replication diagram is incomplete Which nucleotide sequence accurately shows the DNA strand that would be produced during DNA replica O A C DNA Replication TCCA UGGU AGGU AGGT

The Mollusca possess a specialized layer of tissue that secretes its shell This tissue is called the Cuticle Mantle Ectoderm Calcifera Mesoglea

Which of the following are used for gas exchange in the insecta a Malpighian tubes b Spiracles c Ovipositors d Trochanters

Response or Fight Flight or Freeze This assignment should outline your own personal response or expected response to a stressful situation Think of a stressful situation such as public speaking encountering a bear camping or you can think of your own scenario You can demonstrate your understanding by drawing a picture creating a comic strip writing a short story or brief essay creating a short video or audio message submission of your choice This is another student choice submission You can submit this in any way that shows you understand the Stress Response Fight Flight or Freeze Make sure your submission shows an example of a stressful situation and which Stress Response you would act on Think about ways you would act in that situation and what are some ways you can deal with this stress

AB CD What if the name of the subdivision labeled C O Northeast quarter of the southwest quarter of the southeast quarter O Northeast quarter of the southwest quarter of the southwest quarter O None of these O Southwest quarter of the southwest quarter of the northeast quarter

A city s geographic coordinates are 38 34 32 7504 N 121 28 43 8636 W What is this city s latitude using decimal degrees Round to two decimal places Latitude decimal degrees

How many miles in 101 kilometers Round to one decimal place 101 km miles

The reaction below phosphorylation of glucose is exergonic because it is coupled to ATP hydrolysis The enzyme hexokinase catalyzes this reaction Which of the following best describes how an enzyme for this reaction works glucose ATP glucose 6 P ADP The enzyme is activated by phosphorylation thereby providing the energy for the reaction The enzyme makes the reaction exergonic The enzyme is not actually necessary as long as ATP is available to provide energy for the reaction The enzyme alters the mechanism of the reaction by altering the transition state

Shown below is a branched reaction pathway in which either D or E can be made from C Imagine that D must be maintained at or above a minimum threshold concentration and only when it is above this concentration it is ok to produce E Which of the following is the best way to ensure this E1 E4 are the enzymes that catalyze each of the reactions Assume that if an enzyme is subject to activation it is always inactive in the absence of its activator and if it subject to inhibition it is always active in the absence of inhibitor E3 D E1 A B E2 C E4 O Allosteric activation of Enzyme E4 by D O Allosteric activation of Enzyme E3 by E Allosteric inhibition of Enzyme E3 by D Allontorio inhibition of Enzyme F1 by D E

Insert one comme to separate the coordinate adjectives The Great Barrier Reef the largest coral reef in the world is a massive intricate network of coral that provides shelter to a wide array of creature

Which two statements are true of somatic cells in multicellular orgal A They perform specialized functions B They all require the same set of proteins C They all contain identical copies of DNA D Their DNA changes to meet their needs

What characteristic of DNA determines the structures of proteins and thus the expression of traits A Its type of sugar phosphate backbone OB Its number of carboxyl groups O C Its sequence of nucleotides D Its sequence of amino acids

In E coli bacteria the lac operon contains genes that code for enzymes that break down lactose If the bacteria are in an environment with no lactose how will the expression of the lac genes be affected OA The genes will be turned off O B Some of the genes will be turned on and some will be turned off O C The genes will be turned on D The genes will be turned on and off in cycles

Which phrase correctly identifies the role of mRNA O A Carrying amino acids to the site of protein synthesis B Translating the rRNA into a specific amino acid sequence C Transcribing the genetic code into a carbohydrate sequence D Carrying the genetic code from DNA to the cytoplasm for translation

Which type of biomolecule is shown in the model HO HO HO H N C C N C C N C C N C C N C C OH II II HR HO HR HR3 H RA OA A carbohydrate OB A strand of mRNA OC A nucleic acid chain D A polypeptide chain HO T HR5

How does meiosis increase genetic variation among family members OA It produces gametes with unique allele combinations that can be combined during sexual reproduction B It produces zygotes from the combination of two gametes from a single individual C Genes from one gamete are transferred to a different gamete during lateral gene transfer OD Gametes from different individuals are combined forming new combinations of alleles

Chymotrypsin is a pancreatic digestive enzyme that is inactive until it is secreted into the intestines where it is hydrolyzed by the protease Trypsin One of the fragments that results from this hydrolysis is the active form This form of enzyme regulation is O Allosteric inhibition Allosteric activation Zymogen activation Covalent modification O Competitive activation

The reaction below shows the process by which the protease Chymotrypsin becomes activated What is the zymogen Trypsin m chymotrypsinogen O None of the above O Chymotrypsinogen O Trypsin O Unused fragments iamcin mor Jor Bod chymotrypsin w 2 unused fragments

The enzyme phosphofructokinase 1 PFK 1 catalyzes the reaction F6P ATP F1 6BP ADP during glycolysis When ATP concentrations get very high ATP also binds to a location on PFK 1 outside of the active site preventing it from catalysis This is an example of Competitive inhibition Allosteric activation OZymogen activation Allosteric inhibition Covalent modification

Which of the following may be true for an enzyme It may chemically interact with its substrate It may be permanently altered by the reaction It may provide the energy for an endergonic reaction All of the above

Which sentence describes an insertion mutation OA One or more nucleotides are removed from a sequenc OB A nucleotide is shared during bacterial conjugation C One or more nucleotides are added to a sequence D A nucleotide is replaced with another nucleotide

Genetically diverse offspring are possible with budding fragmentation fertilization fission parthono ponie

Mutations in p53 have been linked to many forms of cancer What is the most likely reason for this p53 triggers apoptosis of the cancerous cells p53 halts the cell cycle to prevent the damaged DNA in cancer cells from replication p53 has been mutated so it is unable to detect damaged DNA triggered production of p21

Which of the following would not be the result of a proto oncogene to oncogene conversion A faulty electron transport chain carrier protein being produced in a cell Increased production of human growth factor that causes human bone cells to proliferate Activation of a cyclin dependent kinase that phosphorylates proteins without the activation of cyclin This would be the result of a proto oncogene oncogene conversion because it affects cell proliferation Decreased production of p53

Which one of the following is the odd one while considering the number of chromosomes in daughter cells meiosis II mitosis maioris

You picked up athlete s foot at the gym While pondering the red crustiness between your toes you remember from your biology class that fungi have a haploid dominant alternation of generations diploid dominant sexual life cycle

Insulin like growth factors enhance the effects of other hormones and one of their target tissues is bone The most likely effect of insulin like growth factors would be O a decrease in DNA replication in the bone cells inhibition of cell division in the bone cells an increase in cell division of the bone cells a decrease in the production of proteins needed by the bone cells for cell division

If there are no cyclin dependent kinase inhibitors what would be the most likely outcome for the cell The cell would not be able to pass certain checkpoints Mitosis would cease DNA damage would be prevented If Cdk molecules were not inhibited all checkpoints would be passed and DNA damage would occur unchecked Uncontrolled cell division would occur

If you digest human DNA with restriction enzymes which one of the following enzymes would be expected to produce more fragments O Enzyme with a 4 bp recognition sequence O Enzyme with a 6 bp recognition sequence O Enzyme with an 8 bp recognition sequence All of these enzymes will generate fragments of the same size

The sequence of O lipids sugars Onucleotides O proteins in a DNA molecule determines the protein that will be produced

Which is a problem caused by having an export economy A It causes a reliance on world market prices B They rely too much on import tariffs C Export economies lead to quick industrialization D African businesses have to compete with each other

escribe the genotype of these alleles Gene P P

scribe the genotype of these alleles Gene lo P E Heterozygous P

Identify this individual O Male unaffected Female affected 2015 Person SOO

Macmillan Learning The graph shows the hormone binding specificity of a hypothetical membrane receptor The results are for three different hormones X Y and Z The graph plots the percentage binding capacity of the receptor as a function of hormone concentration for each hormone Using the graph of percentage binding versus hormone concentration give the estimated molar M concentration for each hormone that yields 50 of maximal binding X Y 10 X10 7 5x10 6 Binding to receptor as a percentage of the maximum 100 80 60 40 20 1 X Y 10 8 10 6 10 4 Hormone concentration M Z 10 M M