NS 103 FINAL EXAM
Title:_____________________________________________________________
GENERAL PROCEDURES
1. This examination is open ebook
2. Learn every downside utterly earlier than beginning to reply it. Observe the purpose values
assigned to every downside and finances your time accordingly.
Three. CLEARLY circle the right reply. There is just one right reply for every; no credit score will
be given if multiple reply is chosen
1. In crops, chloroplasts convert the vitality of daylight into
A) the vitality of movement
B) carbon dioxide and water
C) kinetic vitality
D) oxygen
E) the potential vitality of chemical bonds
2. Which is the primary vitality supply for producers in an ecosystem?
A) kinetic vitality
B) gentle vitality
C) thermal vitality
D) chemical vitality
E) ATP
Three. When the blood glucose stage is excessive, the pancreas secretes insulin and therefore the blood
glucose stage declines. When the blood glucose stage is low, the pancreas secretes
glucagon and the blood glucose stage will increase. Such regulation of the blood glucose
stage is known as
A) catalytic suggestions
B) unfavorable suggestions
C) optimistic suggestions
D) bioinformatic regulation
E) protein-protein interactions
four. In describing chemical compositions, every ingredient is exclusive and totally different from others
in chemical properties. Why?
A) Every ingredient has a novel atomic mass.
B) Every ingredient has a novel atomic weight.
C) Every ingredient has totally different radioactive properties.
D) Every ingredient has a novel variety of neutrons in its nucleus.
E) Every ingredient has a novel variety of protons in its nucleus.
5. Please discuss with the periodic desk above. Oxygen has an atomic variety of eight and a mass
variety of 16. Thus, what’s the atomic mass of an oxygen atom?
A) precisely eight grams
B) precisely eight daltons
C) roughly 16 grams
D) 24 amu (atomic mass items)
E) roughly 16 daltons
6. Which of the statements under describes a covalent bond?
A) electrons are faraway from one atom and transferred to a different atom in order that the
two atoms develop into oppositely charged.
B) protons and neutrons are shared by two atoms in order to fulfill the necessities of
each atoms.
C) outer-shell electrons of 1 atom are transferred to fill the inside electron shell of
one other atom.
D) outer-shell electrons of two atoms are shared in order to satisfactorily fill the outer
electron shells of each atoms.
E) an electron occupies a hybrid orbital situated between the nuclei of two atoms.
7. When there may be an unequal sharing of electrons between atoms, what’s the kind of bond
that types?
A) a nonpolar covalent bond
B) a hydrogen bond
C) an ionic bond
D) a polar covalent bond
E) a hydrophobic interplay
eight. What’s chemical equilibrium?
A) Ahead and reverse reactions have stopped in order that the focus of the
reactants equals the focus of the merchandise.
B) Ahead and reverse reactions proceed with no impact on the concentrations of the
reactants and merchandise.
C) Concentrations of merchandise are greater than the concentrations of the reactants.
D) Reactions cease solely when all reactants have been transformed to merchandise.
E) There are equal concentrations of reactants and merchandise, and the reactions have
stopped.
9. Scientists try to synthesize a brand new synthetic compound to imitate the consequences of a
identified hormone that influences sexual habits. Which of the next compounds is
almost certainly to imitate the consequences of the hormone?
A) a compound with the identical variety of carbon atoms because the hormone
B) a compound with the identical molecular mass (measured in daltons) because the hormone
C) a compound with the identical variety of orbital electrons because the hormone
D) a compound with the identical three-dimensional form as a part of the hormone
E) a compound with the identical variety of hydrogen and nitrogen atoms because the hormone
10. Water has excessive particular warmth. That is primarily because of:
A) small dimension of the water molecules.
B) excessive particular warmth of oxygen and hydrogen atoms.
C) incontrovertible fact that water is a poor warmth conductor.
D) absorption and launch of warmth when hydrogen bonds break and kind.
E) greater density of liquid water than strong water (ice).
11. Due to human-driven elevated ranges of carbon dioxide within the ambiance, there may be
extra CO2 dissolving into the ocean, the pH decreases and the ocean turns into extra
acidic. How does this have an effect on marine organisms?
A) Acidification would enhance dissolved carbonate concentrations and promote quicker
progress of corals and shell-building animals.
B) Acidification would lower dissolved carbonate concentrations and promote quicker
progress of corals and shell-building animals.
C) Acidification would enhance dissolved carbonate concentrations and hinder progress of
corals and shell-building animals.
D) Acidification would enhance dissolved bicarbonate concentrations, and trigger
elevated calcification of corals and shellfish.
E) Acidification would lower dissolved carbonate concentrations and hinder progress
of corals and shell-building animals.
12. For water to evaporate, what kind of bond have to be damaged?
A) ionic bonds
B) each hydrogen bonds and ionic bonds
C) polar covalent bonds
D) each polar covalent bonds and hydrogen bonds
E) hydrogen bonds
13. Why does water molecule have a partial unfavorable cost?
A) the oxygen atom acquires an extra electron.
B) the oxygen atom types hybrid orbitals that distribute electrons unequally across the
oxygen nucleus.
C) the oxygen atom has two pairs of electrons in its valence shell that aren’t
neutralized by hydrogen atoms.
D) the electrons shared between the oxygen and hydrogen atoms spend extra time
across the oxygen atom nucleus than across the hydrogen atom nucleus.
E) one of many hydrogen atoms donates an electron to the oxygen atom.
14. In all natural molecules, what’s the frequent ingredient that’s current?
A) hydrogen.
B) oxygen.
C) nitrogen.
D) carbon.
E) phosphorus.
15. To finish its valence shell, what number of electron pairs does carbon share?
A) 1
B) 2
C) Three
D) four
E) eight
16. Which of the next properties describes cis-trans isomers?
A) They’ve the identical chemical properties.
B) They’ve an uneven carbon that makes them mirror photos.
C) They’ve variations in association round a double bond.
D) They’ve totally different molecular formulation.
E) Their atoms and bonds are organized in several sequences.
17. Please discuss with the image under.
What are the useful group(s) that’s (are) current in all amino acids?
A) A and B
B) B and D
C) C and D
D) D solely
E) C solely
18. To look at the actions of condensed chromosomes throughout cell division, what would
you utilize?
A) scanning electron microscopy
B) gentle microscopy
C) transmission electron microscopy
D) confocal fluorescence microscopy
E) super-resolution fluorescence microscopy
19. Prokaryotes are categorised as belonging to 2 totally different domains. What are the
domains?
A) Micro organism and Eukarya
B) Archaea and Protista
C) Micro organism and Archaea
D) Micro organism and Protista
E) Micro organism and Fungi
20. We will observe massive numbers of ribosomes which might be current in cells. These are
specialised in producing which of the next molecules?
A) lipids
B) glycogen
C) nucleic acids
D) cellulose
E) proteins
21. Which of the next is primarily concerned within the synthesis of oils, phospholipids, and
steroids?
A) ribosome
B) lysosome
C) mitochondrion
D) easy endoplasmic reticulum
E) contractile vacuole
22. How does protein secretion work in prokaryotic cells?
A) Prokaryotes are unlikely to have the ability to secrete proteins as a result of they lack an
endomembrane system.
B) The mechanism of protein secretion in prokaryotes might be the identical as that in
eukaryotes.
C) Prokaryotes comprise massive pores of their plasma membrane that allow the
motion of proteins out of the cell.
D) In prokaryotes, the ribosomes which might be used for the synthesis of secreted proteins are
situated outdoors of the cell.
E) Proteins which might be secreted by prokaryotes are synthesized on ribosomes which might be
sure to the cytoplasmic floor of the plasma membrane.
23. What’s the major web site of ATP synthesis in eukaryotic cells?
A) lysosome
B) vacuole
C) Golgi equipment
D) mitochondrion
E) peroxisome
24. Which organelle or construction do Thylakoids, DNA, and ribosomes are present in?
A) vacuoles.
B) nuclei.
C) mitochondria.
D) lysosomes.
E) chloroplasts.
25. Which of the next statements describes the cytoskeleton?
A) The dynamic facet of cytoskeletal operate is made attainable by the meeting and
disassembly of a big number of proteins into complicated aggregates.
B) Microfilaments are structurally inflexible and resist compression, whereas microtubules
resist stress (stretching).
C) Chemical compounds that block the meeting of the cytoskeleton would trigger little impact on the
cell’s response to exterior indicators and stimuli.
D) Motion of cilia and flagella is the results of motor proteins inflicting microtubules to
transfer relative to one another.
E) Transport vesicles among the many membranes of the endomembrane system produce the
cytoskeleton.
26. What’s the right pathway of a newly synthesized protein previous to being secreted by a
cell?
A) ER →Golgi →vesicles that fuse with plasma membrane
B) Golgi →ER →lysosome
C) nucleus →ER →Golgi
D) ER → Golgi → nucleus
E) ER →lysosomes →vesicles that fuse with plasma membrane
27. The foremost structural elements of the cell membrane are?
A) phospholipids and cellulose
B) nucleic acids and proteins
C) proteins and cellulose
D) phospholipids and proteins
E) glycoproteins and ldl cholesterol
28. What’s the operate of ldl cholesterol within the plasma membranes?
A) allows the animal so as to add hydrogen atoms to unsaturated phospholipids.
B) allows the animal to take away hydrogen atoms from saturated phospholipids.
C) allows the membrane to remain fluid extra simply when cell temperature drops.
D) makes the membrane much less versatile, permitting it to maintain larger strain from inside
the cell.
E) makes the animal extra inclined to circulatory issues.
29. What’s the attribute of an integral membrane protein?
A) amphipathic, with no less than one hydrophobic area.
B) hydrophobic.
C) hydrophilic.
D) utterly lined with phospholipids.
E) uncovered on just one floor of the membrane.
30. What permits lipids and proteins free to maneuver laterally in membranes?
A) There are solely weak hydrophobic interactions within the inside of the membrane.
B) Lipids and proteins repulse one another within the membrane.
C) Hydrophilic parts of the lipids are within the inside of the membrane.
D) The inside of the membrane is crammed with liquid water.
E) Molecules comparable to cellulose can pull them in varied instructions.
31. The method that describes how white blood cells engulf micro organism is?
A) exocytosis
B) pinocytosis
C) phagocytosis
D) osmosis
E) receptor-mediated exocytosis
32. In receptor-mediated endocytosis, receptor molecules initially venture to the surface of
the cell. The place do they find yourself after endocytosis?
A) on the surface of vesicles
B) on the within floor of the cell membrane
C) on the outer floor of the nucleus
D) on the within floor of the vesicle
E) on the ER
33. You’re not too long ago employed by a pharmaceutical firm and have been engaged on a crew
that’s designing a brand new drug. For this drug to work, it should enter the cytoplasm of
particular goal cells. Which of the next could be an element that determines whether or not
the molecule selectively enters the goal cells?
A) blood or tissue kind of the affected person
B) hydrophobicity of the drug molecule
C) lack of cost on the drug molecule
D) lipid composition of the goal cells’ plasma membrane
E) similarity of the drug molecule to different molecules transported by the goal cells
34. The primary legislation of thermodynamics is?
A) The entropy of the universe is fixed.
B) The entropy of the universe is lowering.
C) Vitality can’t be created or destroyed.
D) Kinetic vitality is saved vitality that outcomes from the precise association of matter.
E) Vitality can’t be transferred or reworked.
35. Every time vitality is reworked, there may be at all times a rise within the
A) free vitality of the system.
B) free vitality of the universe.
C) entropy of the system.
D) enthalpy of the universe.
E) entropy of the universe.
36. What’s an instance of potential somewhat than kinetic vitality?
A) the muscle contractions of an individual mowing grass
B) a molecule of glucose
C) gentle flashes emitted by a firefly
D) the flight of an insect foraging for meals
E) water speeding over Niagara Falls
37. Which of the next accurately describes metabolism in its entirety in all organisms?
A) Metabolism consists of all of the vitality transformation reactions in an organism.
B) Metabolism will depend on an organism’s enough hydration.
C) Metabolism makes use of all of an organism’s sources.
D) Metabolism will depend on a relentless provide of vitality from meals.
E) Metabolism manages the rise of entropy in an organism.
38. What finest describes the mathematical expression for the change in free vitality of a
system, ΔG =ΔH – TΔS?
A) ΔS is the change in enthalpy, a measure of randomness.
B) ΔH is the change in entropy, the vitality accessible to do work.
C) T is the temperature in levels Celsius.
D) ΔG is the change in free vitality.
39. When there’s a optimistic ΔG, the chemical response is?
A) endothermic.
B) endergonic.
C) enthalpic.
D) spontaneous.
E) exothermic.
40. How does enzymes work?
A) Nonprotein cofactors alter the substrate specificity of enzymes.
B) Enzyme operate is elevated if the Three-D construction or conformation of an enzyme is
altered.
C) Enzyme operate is impartial of bodily and chemical environmental components such
as pH and temperature.
D) Enzymes enhance the speed of chemical response by offering activation vitality to the
substrate.
E) Enzymes enhance the speed of chemical response by reducing activation vitality
obstacles.
41. The oxidation means of natural compounds by molecular oxygen to supply CO₂ and
water launch free vitality. Why?
A) The covalent bonds in natural molecules and molecular oxygen have extra kinetic
vitality than the covalent bonds in water and carbon dioxide.
B) The electrons have the next potential vitality when related to water and CO₂
than they do in natural compounds.
C) The oxidation of natural compounds can be utilized to make ATP.
D) Electrons are being moved from atoms which have a decrease affinity for electrons (such
as Carbon) to atoms with the next affinity for electrons (comparable to Oxygen).
E) The covalent bond in O₂ is unstable and simply damaged by electrons from natural
molecules.
42. Which of the next statements describes NAD⁺?
A) Within the absence of NAD⁺, glycolysis can nonetheless operate.
B) NAD⁺ has extra chemical vitality than NADH.
C) NAD⁺ is oxidized by the motion of hydrogenases.
D) NAD⁺ can donate electrons to be used in oxidative phosphorylation.
E) NAD⁺ is decreased to NADH throughout glycolysis, pyruvate oxidation, and the citric acid
cycle.
43. Which of the next phases of mobile respiration is Carbon dioxide (CO₂) launched?
A) glycolysis and the oxidation of pyruvate to acetyl CoA
B) oxidative phosphorylation and fermentation
C) the citric acid cycle and oxidative phosphorylation
D) oxidation of pyruvate to acetyl CoA and the citric acid cycle
E) fermentation and glycolysis
44. In chemiosmotic phosphorylation, what’s the most direct supply of vitality that’s used
to transform ADP + Pi to ATP?
A) vitality launched as electrons stream by means of the electron transport system
B) vitality launched from substrate-level phosphorylation
C) vitality launched from motion of protons by means of ATP synthase, down the
electrochemical gradient
D) vitality launched from motion of protons by means of ATP synthase, towards the
electrochemical gradient
E) No exterior supply of vitality is required as a result of the response is exergonic.
45. Yeast cells can get hold of vitality by fermentation. The byproducts are?
A) ATP, NADH, and pyruvate.
B) ATP, CO₂, and lactate.
C) ATP, CO₂, and ethanol (ethyl alcohol).
D) ATP, pyruvate, and oxygen.
E) ATP, pyruvate, and acetyl CoA.
46. Which of the next are merchandise of the sunshine reactions of photosynthesis which might be
utilized within the Calvin cycle?
A) CO₂ and glucose
B) ATP and NADPH
C) ADP, Pi, and NADP⁺
D) electrons and H⁺
E) H₂O and O₂
47. Which of the next is Photosynthesis not accountable for?
A) oxygen within the ambiance.
B) the ozone layer.
C) a lot of the natural carbon on Earth’s floor.
D) fossil fuels.
E) atmospheric CO₂.
48. Which of the occasions listed under happens within the gentle reactions of photosynthesis?
A) Gentle is absorbed and funneled to reaction-center chlorophyll a.
B) NADPH is decreased to NADP⁺.
C) Carbon dioxide is integrated into PGA.
D) ATP is phosphorylated to yield ADP.
E) NADP is produced.
49. In mitochondria, chemiosmosis translocates protons from the matrix into the
intermembrane area, whereas in chloroplasts, chemiosmosis translocates protons
from
A) the stroma to the photosystem II.
B) the matrix to the stroma.
C) the intermembrane area to the matrix.
D) the stroma to the thylakoid area.
E) the thylakoid area to the stroma.
50. What’s the relationships between the sunshine reactions and the Calvin cycle?
A) The sunshine reactions present ATP and NADPH to the carbon fixation step of the Calvin
cycle, and the cycle gives water and electrons to the sunshine reactions.
B) The sunshine reactions present ATP and NADPH to the Calvin cycle, and the cycle returns
ADP, Pi, and NADP⁺ to the sunshine reactions.
C) The sunshine reactions provide the Calvin cycle with CO₂ to supply sugars, and the Calvin
cycle provides the sunshine reactions with sugars to supply ATP.
D) The sunshine reactions present the Calvin cycle with oxygen for electron stream, and the
Calvin cycle gives the sunshine reactions with water to separate.
E) There isn’t a relationship between the sunshine reactions and the Calvin cycle.