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LFS103 Final Exam
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Preguntas del test (69)
1Which of the following is an example of a chemical change?
- ABoiling water
- BDistillation of alcohol
- CMagnetic removal of iron fillings from sand
- DCaramelisation of sugar on creme brulee
2Where on the Periodic Table would you find Sodium?
- AI don’t know
- BPeriod 1, Group 3
- CPeriod 3, Group 1A
- DPeriod 1 Group 3A
- EPeriod 3, Group 1B
3If an unknown element had the following characteristics; low in density, a liquid at room temperature and did not conduct electricity, what type of element is it most likely to be?
- AMetal
- BMetalloid
- CNon-metal
4What subatomic particle determines the atomic number of an element?
- AElectrons
- BProtons
- CPhotons
- DNeutrons
5Which of the following is NOT a characteristic of a metal?
- AHigh density
- BMost are liquid at atmospheric pressure and room
temperature - CMetallic
- DMalleable and ductile
6What is the chemical symbol for the isotope with the following characteristics; atomic mass of 29, and 15 neutrons?
- ASi
- BCu
- CP
- DK
7If we have an atom that has an atomic number of 12, what is its electron configuration?
- A12
- B3, 7, 2
- C2, 10, 0
- D2, 8, 2
8Which Group of elements on the Periodic Table have 2 valence electrons?
- AAlkali metals
- BAlkaline earth metals
- CHalogens
- DNoble gas
9Which of the following is the correct electron dot structure for Phosphorus?
- Aa
- Bb
- Cc
- Dd
10An ion has a different number of __________ compared to its number of electrons, and hence causes the atom to have an overall charge?
- ANeutrons
- BPhotons
- CProtons
- DQuarks
11All cations are ________ and form ions that have a positive charge, whereas all anions are ________ and form ions that have a negative charge.
- AMetals, metalloids
- BNon-metals, metals
- CTransitional metals, metalloids
- DMetals, non-metals
- ENon-metals, metalloids
12Which of the following statements are true?
- ACovalent bonds are where electrons are gained or lost to atoms in the compound
- BIonic compounds are formed between cations and anions whereas covalent compounds are formed by covalent bonds
- CIonic bonds are where electrons are shared by atoms in the compound
- DIonic compounds are formed between cations and anions whereas covalent compounds are formed by ionic bonds
13What is the chemical formula for the ionic compound consisting of magnesium and bromine? Mg2+ Br-
- AMgBr
- BMgBr2
- CMg2Br
- DMg3Br
14What is the name of this ionic compound: MgBr2?
- AMagnesium bromine
- BMagnum bromide
- CDimagnesium bromide
- DMagnesium dibromide
- EMagnesium bromide
15What is the chemical name for PF3? (3 is subscript)
- APhosphorus fluoride
- BPhosphide fluoride
- CPhosphide trifluoride
- DPhosphorus trifluoride
16What is the correct term for a chemical reaction that releases heat as the reaction goes forward?
- AThermodynamic
- BEndothermic
- CExothermic
- DIts electrifying
17What are the four organic compounds (macro-molecules) that form the building blocks of life?
- AMonosaccharides, amino acids, fatty acids, nucleotides
- BCarbohydrates, amino acids, lipids, nucleic acids
- CCarbohydrates, proteins, lipids, nucleotides
18Which of the following describes activation energy?
- AThe energy investment required to move reactants into their transitional state
- BA catalyst can be added to increase the activation energy of a reaction
- CThe energy investment required to begin the process of converting reactants to products (energy required to contort/break bonds between atoms of the reactants)
- DA, B and C are correct
- EA and C are correct
19Which of the following statements about enzymes is true?
- AAll enzymes function at the same pH
- BContinually increasing the temperature will increasingly speed up the reaction
- CThe active site of all enzymes has the same 3D shape
- DAll of the above
- ENone of the above
20Which of the following statements is true?
- ACatabolic reactions are the breakdown of more complex molecules to simple molecules and require energy to do so.
- BAnabolic reactions are the breakdown of more complex molecules to simple molecules and require energy to do so.
- CCatabolic reactions are the breakdown of more complex molecules to simple molecules and give up energy in the process.
- DAnabolic reactions are the building of complex molecules from numerous simple ones and give up energy to do so.
21Where do we find the genetic information of prokaryotic cells?
- AProkarryon luggage
- BCytoplasm
- CNucleoid region
- DCell membrane
22What are the key differences between a prokaryotic and eukaryotic cell?
- AA) A prokaryotic cell contains membrane bound organelles
- BB) A eukaryotic cell contains membrane bound organelles
- CC) A prokaryotic cell contains circular DNA
- DD) A eukaryotic cell contains circular DNA
- EE) B and C are correct
23What is a function of the peroxisome?
- AA) Detoxification
- BB) Fatty acid breakdown
- CC) Manufacture and metabolism of lipids
- DD) Produces ATP
- EE) None of the above
- FF) A and B are correct
24What is NOT a function of the smooth ER?
- AHouses digestive enzymes that are involved in phagocytosis and intracellular digestion
- BMetabolise carbohydrates
- CStorage of Calcium ions
- DSynthesis of lipids
- EDetoxification
25What cytoskeletal filament are the centrioles comprised of?
- AMicrofilament
- BMicrotubule
- CIntermediate filament
- DCytoskeletal filament
26Why would an enterocyte (small intestine cell) have microvilli?
- AMovement of food molecules along the digestive tract.
- BSo the gut cells can dance with the gut microbes.
- CTo help the cells move through the digestive material
- DIncrease surface area for increased rate of absorption and secretion.
- ETo increase surface area for increased rate of gas exchange.
27What does the term amphipathic mean?
- AA molecule that is only hydrophilic
- BA molecule that is only nonpolar
- CA molecule containing polar regions and hydrophilic regions
- DA molecule containing polar regions and hydrophobic regions
28The bulk transport of extracellular fluid into the cell is called?
- APhagocytosis
- BPinocytosis
- CReceptor-mediated cytosis
- DExocytosis
29Which of the following molecules could pass freely through the membrane?
- ANa+
- BCl-
- CProtein (very large molecule)
- DSmall non-polar molecule
30If an animal cell is placed into a hypertonic salt solution, what will happen to the cell?
- ASolute will move into the cell, resulting in a net flow of water into the cell, eventually causing the cell to burst.
- BDue to the solute gradient, there will be a net flow of water into the cell, as water moves down its concentration gradient, eventually causing the cell to burst.
- CSolute will move out of the cell, resulting in a net flow of water out of the cell, eventually causing the cell to shrivel.
- DDue to the solute gradient, there will be a net flow of water out of the cell, as water moves down its concentration gradient, eventually causing the cell to shrivel.
31Somatic cells contain 2 copies of each chromosome.
- AVerdadero
- BFalso
32In what phase of mitosis do the chromosomes begin to condense?
- AProphase
- BPrometaphase
- CMetaphase
- DAnaphase
- ETelophase
- AProphase
33In what phase of mitosis do the sister chromatids separate?
- AProphase
- BPrometaphase
- CMetaphase
- DAnaphase
- ETelophase
- AProphase
34In what phase does the nuclear membrane begin to reform?
- AProphase
- BPrometaphase
- CMetaphase
- DAnaphase
- ETelophase
- AProphase
35Epithelial tissue is characterised by each of these traits, except that ________.
- Ait lacks blood vessels
- Bit functions in secretion, absorption, filtration and excretion
- Cepithelial cells are loosely packed and have much intercellular material and matrix
- Dit is anchored to a basement membrane
- ESpecialised cells help detect changes in the internal and external environment
36Connective tissue is complex because it has a variety of cells and non-cellular background called a ________ surrounding them.
- Acollagen
- Belastin
- Cmucous secretion
- Dmatrix
37What name is given to the matrix of blood?
- AFluid
- BPlasma
- CGround substance
- DCytosol
38The type of muscle found in the iris of the eyes is called _______________.?
- ASkeletal muscle
- BCardiac muscle
- CSmooth muscle
- DEye and vessel muscle
39Neuroglia conduct electrical impulse to moderate a post-synaptic cell.
- AVerdadero
- BFalso
40The location of a particular gene is called _______, and in every somatic cell we have ____ copy/copies of each gene?
- ALocus, 1
- BLocus, 2
- CChromosome, 1
- DChromosome, 2
41The genetic makeup of an organism is its __________ while the physical presentation of the its traits are called ____________?
- AHomozygous, heterozygous
- BGenotype, phenotype
- CHeterozygous, homozygous
- DPhenotype, genotype
42Cystic fibrosis is caused by a recessive allele. What genotype must the mother be to
have no chance of a child having the disease if the father has cystic fibrosis?- AHomozygous recessive
- BHeterozygous
- CHomozygous dominant
- DNot enough information
43A red-green colour-blind man has a daughter with red-green colour blindness what must be the genotype of the mother who has normal vision?
- AXNxn
- BXNXN
- Cxnxn
- DNN
- Enot an answer just info reference
- AXNxn
44What is the chromosomal alteration characterised by a segment of chromosome that has been replaced by a segment of another non-homologous chromosome?
- ADeletion
- BDuplication
- CInversion
- DTranslocation
45If the inherited trait in question is present in every generation of a family
pedigree, it is most likely to be a ________ trait?- ADominant
- BRecessive
- CSex-linked
- DNot enough information is provided
46Which of the following statements is true about transcription?
- AOccurs in the nucleus and involves the transfer of the information contained in a DNA sequence to mRNA
- BOccurs in the cytoplasm and involves the assembly of an amino acid sequence using the information encoded by tRNA
- COccurs in the nucleus and involves the transfer of the information contained in a DNA sequence to tRNA
47Which of the following is incorrect;
- ABacteria have linear DNA
- BBacteria have a plasma membrane
- CBacteria have cell walls containing peptidoglycan
- DBacteria replicate by a process called binary fission
48In Gram staining, if a species of bacteria retains the crystal violet stain at completion of
the technique. Then the bacteria is;
- AGram negative, due to the cell wall containing large amounts of peptidoglycan which retains the crystal violet stain.
- BGram positive, due to the cell wall containing large amounts of peptidoglycan which retains the crystal violet stain.
- CGram negative, due to the cell wall containing large amounts of lipopolysaccharides which retains the crystal violet stain.
49What name do we assign microbe-host relationships where one benefits at the expense of the other?
- ASymbiosis
- BMutualism
- CParasitism
- DCommensalism
50Koch’s postulates helped to;
- Aidentify and characterise a particular microorganism.
- Bdetermine which animal a microorganism will infect.
- Cdetermine the relationship between the host and the microorganism.
- Ddetermine the microorganism involved in a particular disease.
51Cattle are allowed to pasture in a field that contains the farmhouse well, and the
farmer’s family becomes ill with a gastrointestinal pathogen after drinking the water. What type of transmission of infectious agents would this be?- Abiological vector transmission
- Bdirect contact transmission
- Cindirect contact transmission
- Dvehicle transmission
52A blanket from a child with chickenpox is likely to be contaminated with the virus that
causes chickenpox (Varicella-zoster virus). What is the blanket called?- AHost
- BPathogen
- CFomite
- DVector
53Which is the most common type of biological vector of human disease?
- Aviruses
- Bmammals
- Cbacteria
- Darthropods
54What characterises the incubation phase of disease development?
- APeriod of disease from infection to showing any non-specific signs/symptoms.
- BPeriod of disease when non-specific signs/symptoms are exhibited.
- CPeriod of invasive infection where signs/symptoms are characteristic of that particular disease are exhibited.
- DPeriod of decline in number of infectious particles, severity of symptoms decline.
- EPeriod of convalescence and recovery.
55As a Healthcare or Allied-Health Professional what is the best way you can prevent the spread of HCAI/HAI infections?
- ANo physical contact with patient.
- BNo sharing of food.
- CWashing hands before and after patient care.
- DShower before work.
56What term do we give outbreaks that suddenly arise in a particular location?
- AEndemic
- BEpidemic
- CPandemic
- DHectic
57Comparing the bacterial growth pattern around antibiotic A and antibiotic B- Which of the 2 antibiotics is the bacteria resistant to?
- AAntibiotic A
- BAntibiotic B
- CNeither
- DBoth
58Which of the following are contributors to the spread of antibiotic resistance?
- AIncorrect prescription of antibiotics
- BUse in household products
- CUse of growth promoters and in food supplements for the agricultural industry
- DAll of the above
59A solution consists of?
- AMany solvents and many solutions
- BWater and may contain many solutes and or solvents
- COne solvent but may contain many solutes
- DOne solute but may contain many solvents
60What is the amount of casein (a milk protein) required to make a 130mL milk solution containing 5% casein milk?
- A1.5g
- B6.5g
- C13g
- D2.6g
61A 100 mL volume of a 6% dextrose solution needs to be prepared from a concentrated 20% dextrose solution.
- A10
- B20
- C30
- D40
62The fluid compartments of the body (i.e. intracellular fluid, interstitial fluid and plasma) consist of the same composition and concentration of solutes.
- AVerdadero
- BFalso
63During inspiration, there is ________ pressure in the thoracic cavity compared to external atmospheric pressure causes air to passively ______ the lungs.
- Aincreased, flow into
- Bdecreased, flow into
- Cincreased, flow out
- Ddecreased, flow out
64What name do we give to substances that when dissolved in water and form a
solution that conducts electricity?- AA polar molecule
- BAn ionic compound
- CAn electrolyte
- DA non-polar molecule
65Which of the following statements about acids is CORRECT?
- AAcids produce OH- ions when in water
- BAcids produce H+ ions when in water
- CAcids have a soapy feeling
- DStrong acids only partly ionise when in water
66A solution with a greater amount of [H+] than [OH-] would be considered?
- ABasic
- BNeutral
- CAcidic
67Sulphuric acid 98 that has a [H+] of 0.5 x 10-1 M, has a pH of?
- A1.3 pH
- B0.5 pH
- C3.0 pH
- D5 pH
68If equal amounts of a pH 5 acid was added to a pH 9 base, what would the pH of solution be? (Consider why.)
- A5 pH
- B9 pH
- C14 pH
- D7 pH
69When small amounts of the acid HCl are added to a buffer solution containing its conjugate base, what happens to the H+ ions?
- AThe H+ ions combine with conjugate base molecules and are neutralised.
- BThe H+ ions stay in the solution and cause the pH to decrease.
- CThe H+ ions combine with conjugate base molecules and form a basic compound that causes the pH to increase.
- DThe H+ ions stay in the solution and cause the pH to increase.
Información
- Descripción
- Biology Test sobre LFS103 Final Exam , creado por Talesha Lindsay el 28/05/2024.
- Autor
- Talesha Lindsay
- Idioma
- English
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