The Living World Questions and Answers

10 Explain why the coefficient of relatedness is important for biologists studying the evolution of altruism

st S d t t d S d sxt Solve for Speed Show all your work units and box your final answer A cyclist covers a distance of 30 km in 2 hours Calculate his speed S d t

2 Mucin is a protein present in saliva and other secretions When mixed with water it becomes the slippery substance known as mucus Trace the route taken by mucin through the cell from its synthesis to its secretion listing all the organelles and processes involved

Which of the following is are examples of impulsive force Hitting a tennis ball with a racket Catching a hard hit ball with a glove O Hitting a golf ball with a club O All of the choices

O a force O the product of the force and the time for which the force acts O the ratio of the force and the time for which the force acts an acceleration

In the egg drop experiment when a large egg is dropped onto a piece of 1 inch foam from what height did the egg shatter completely 1 m O 5m O 10 m O The large egg did not break when dropped onto the 1 inch foam

Question 1 An object that has units of momentum must experience 100 units of impulse in order to bring the object to a stop 50 O 100 O 25 Points 2 200

gel run dry before application of the sample 18 T F The most commonly used types of supports for gel filtration chromatography are dextran polyacrylamide and ribulose

A soccer player kicks a 0 4 kg ball that is initially at rest so that it moves with a velocity of 20 m s If the player s foot was in contact with the ball for 0 01 s what was the force exerted by the player s foot on the ball 400 N 800 N 600 N O200 N

If a particle s kinetic energy is zero what is its momentum O Four O Zero O One O Ten

If the kinetic energy of an object having mass 1 kg is 8 joule what is its velocity O 5 0 m s 1 0 m s O 4 5 m s O 4 0 m s

Which of the following expressions for force is correct OF mvt OF mpt O F mv t OF mp t

26 T F The number 150 in Sephadex G 150 means that it has and exclusion limit of 150 kD kiloDaltons molecular weight x 1000 27 T F The G in Sephadex G 50 refers to the glucose subunits that make up the gel beads

the gel beads 28 If you place a protein with an oblong shape on a gel filtration column why does it appear to be larger than a roughly spherical protein in its elution profile even though the molecular weight of both proteins is the same

The volume at which blue dextran elutes on a gel filtration volume 23 column is also known as the

Question 9 Points 1 As a car is being pushed down the road it moves forward because of O frictional force unbalanced force gravitational force O balanced force

Question 8 Points 1 The tendency of an object at rest to remain at rest or an object in motion to persist in motion is known as O acceleration O gravity O inertia O persistence of motion

Question 6 Points 1 If an object is at rest we say that an unbalanced force acting on it the net external force acting on it is zero the object moving with a constant acceleration the object is movable

Question 3 Points 2 You are given a list of objects Bowling ball Tennis ball Billiard ball Basket ball Which object has the least inertia O Bowling ball O Tennis ball Billiard ball O Basket ball

Question 5 An object is at equilibrium when the net force acting on the object is Points 1 O less than zero more than one one O zero

Question 2 Points 1 Consider a metal disk rests on an index card that is balanced on the top of a glass When the index card is quickly pulled away from the glass in a horizontal direction the disk falls straight down into the glass This action is a result of the disk s Metal disk Index card O inertia O shape O charge O temperature Glass

13 State whether the following results are both reliable and valid Explain 6 marks a A national political survey asks a group of high school students what party they favour in order to determine which party will win the next election b All the traffic lights in a town are timed and it is found that they consistently stay yellow for four seconds c The radio station Fan 590 has a phone in survey to determine if the coach of the Toronto Maple Leafs should be fired and 93 of the people who call in are in favour

Write 4 thoughtful paragraphs answering the following questions Is the USA a patriarchal matriarchal or gender egalitarian society Why Be sure to address gender stratification in the economy politics education and family Write one paragraph for each A complete list of used sources must be included after the 4 paragraphs Your answers to the questions must be of substantial quality in order to get points Substantial quality includes a demonstration that you have completed the required readings and videos and thought critically about them Your answers must be original use your own ideas and words Do not copy from any website or written material from another person Grading criteria Student can gain up to 5 points per paragraph written and 5 points for the bibliography list of sources consulted Each paragraph must address one of the areas 1 economy 2 politics 3 education 4 family Each paragraph must demonstrate that the student completed the required readings and videos Each paragraph must contain a direct reference or quotation to some of the required readings Each paragraph must be original using student s own work and ideas A complete list of used sources must be included after the 4 paragraphs Sources must be listed using APA ASA format 0 G 4

Select the correct answer In a marine ecosystem clownfish hide from their predators in the tentacles of sea anemones These fish also protect anemones from butterflyfish which eat anemones Which type of relationship do clownfish and sea anemones have O A predation OB O c parasitism OD mutualism commensalism

Select the correct answer The caretaker of a farm feeds hay to the cows to procure milk from them How much energy will the cows get from the hay OA 20 B 50 OC 10 D 100

7 Select the correct answer from each drop down menu How can you quantify total biomass in a region Total biomass in a region is quantified by measuring the mass of all the plants and in a population habitat or regi

Select the correct answer How much has the amount of carbon dioxide in the atmosphere increased since 1750 O A 10 B 30 O c OD 50 40

Select the correct answer What is the most common method used to count a large species population A estimating sampling C guessing D a pencil and paper B

T F The large intestine is primarily responsible for proper water and ion absorbance and balance in the body 21 22 T F Two proteins that have different shapes but the same molecular weight will always elute at the same rate on the same size gel filtration column

40 Ten people are sitting in a row Their objective is to whisper a secret from one person to the next all the way down the row The first person whispers the secret to the second person who passes the secret to the third person and so on After whispering to the third person the second person in the row notices the ninth person has fallen asleep in their chair so she gets up goes down the row and shakes person nine awake This example is similar to A feed forward activation C negative modulation B positive cooperativity D allosteric control 40

38 The flow of material through a reaction pathway usually depends on A control of the first step of the pathway B covalent modification of the enzyme that catalyzes the reaction C feed forward activation D control at several steps in the pathway 38

27 Drugs called statins lower cholesterol levels because they A degrade HMG CoA reductase C inhibit HMG CoA reductase B bind bile salts D bind serum cholesterol 27

37 The flow of material through a metabolic pathway is called the B flux A cascade effect C current D degree of amplification 37

31 Elevated levels of the hormone stimulate the conversion of triacylglycerols stored in adipose cells to free fatty acids and monoacylglycerols to provide energy when carbohydrate stores are depleted A ergosterol B glucagon C epinephrine D insulin 31

28 There are four steps in the B oxidation pathway Some reaction types are listed below Give the proper reaction types in the order that they occur in the oxidation pathway 1 condensation 2 oxidation 3 reduction 4 thiolysis 5 hydration 6 phosphorylation rearrangement 7 A 1 2 3 5 B 2 5 2 4 C 1 7 2 2 D 6 3 4 2 28

D glycerophospholipids only 26 Eicosanoids are not like hormones in that they A can mediate inflammation and swelling C are chemically diverse B act in the area where they are formed D can alter blood flow

22 The elongation of fatty acids is a repetition of three reactions adding carbons from each cycle until completion A malonyl CoA B malonyl ACP C acetyl ACP after D acetyl CoA

25 Phosphatidate is an intermediate in the synthesis of A cholesterol B triacylglycerols and glycerophospholipids C sphingolipids D glycerophospholipids only

23 Which of the following is true for carboxylation of acetyl CoA A It is a metabolically reversible reaction B In animals and yeast it requires three separate protein subunits C In bacteria it is catalyzed by a bifunctional enzyme D The regulatory enzyme is acetyl CoA carboxylase

AaxAa AAA AG a Aaaa Genotype Small Plants 1A 2a Thornless raspberry plants are due to a recessive allele t what would be the genotype for a thornle raspberry plant Homozygous recessive allele Genotype

Select the correct answer Catherine is working on a study of different groups of animals In which group of animals would she find the most diversity OA omnivores OB carnivores C mammals D invertebrates O E vertebrates

20 Why are triacylglycerols able to provide more energy than carbohydrates gram for gram A The carbohydrates contain fewer carbon carbon bonds B The carbohydrates are already in a more oxidized state than the triacylglycerols C The triacylglycerols are less soluble in water than the carbohydrates D The triacylglycerols have an extremely high group transfer potential 20

7 Which of the following traits is least likely to be considered a counter intuitive to natural selection A Monogamy in male songbirds B Altruism in worker ants C Camouflaged color patterns in grasshoppers D Blood donation by college students

Which of the following statements is correct Effect of force depends on its magnitude alone Effect of force depends on its direction alone O Effect of force depends on its magnitude and direction O Force is a scalar quantity

Which of the following is a non contact force O Tension force O Applied force O Gravitational force O Frictional force

Velocity time graph of a cyclist is shown below Velocity Time Graph Velocity m s 12 10 8 6 20 0 3m O 6m 2 O9m 4 6 Time s How much is the distance the cyclist crossed between t 0s to t 3 s 8 10

Question 5 Points 1 Which of the following is the correct representation of kinematic equation O x xo vot at O x xo vot at O v 1 2a x xo O v vo 1at

The area under the velocity time graph represents O acceleration O velocity O time O displacement

Question 2 Points 2 Which of the following is true in the case of uniformly accelerated linear motion Acceleration is constant Velocity is constant O Displacement is constant Velocity is zero

What feature of DNA replication did Fred Sanger cleverly take advantage of when he invented dideoxy DNA sequencing using ddNTPs Heat denatures hydrogen bonds between As and Ts at a lower temperature than Cs and Gs Wobble rules allow occasional mispairing of bases RNA nucleotides are degraded faster because they have a 2 OH Ligase creates a phosphodiester bond ODNA polymerase can only add new nucleotides to a 3 OH