Biology exam 2 Module HW/ Pre-assessment

True/ False: All spontaneous reactions happen quickly.

False

T or F: During Oxidative phosphorylation, the ATP is formed by substrate level phosphorylation.

False Glycolysis and Krebs

T or F: ATP synthase is an enzyme that carries out hydrolysis(breakdown) of ATP.

False helps it put it back together

T or F: Unlike animals cells, all bacteria's have cell wall.

False most bacteria but not all

T or F: Glycolysis happens in presence of Oxygen.

False, can happen in fermentation (anaerobic) and cellular resp (aerobic)

T or F: Glycolysis yields 2 molecule of Pyruvate, 2 molecules ATP and 2 molecules of NADH and 2 molecules of FADH2.

False, it does not yield the 2 molecules of FADH2

T or F: A polar molecule is one that is hydrophobic in nature

False, polar=philic

A Plant cell placed in a Isotonic solution will be Plasmolysed Lysed Normal Flaccid Shriveled

Flaccid

The DNA in a Prokaryotic Cell is found in a region known as

nucleoid

Those that can only survive in aerobic conditions are ______ aerobes.

obligate

Na+-K+ pump maintains both electrical and concentration gradient of ions by pumping 3 Na+ ions _______ of cell while bringing 2 K+ ions ______ the cell.

out, in

FAD is the ________ state of the coenzyme.

oxidized

When a substance loses electron in a reaction, it gets ________

oxidized

During Respiration _____ acts as the final electron acceptor.

oxygen

The transport of substance that happens without input of energy is called _______ transport.

passive

A Phospholipid's hydrophobic part is its fatty acid tail, and the hydrophillic part is it's the _____ head.

phosphate

NADH and FADH2 are coenzymes is their _______ states.

reduced

In the formation of Ionic bond between Sodium and Chlorine, the chlorine _____ ends up getting while sodium gets _____

reduced, oxidized

Anabolic reactions _____ ATP.

require

The organelle called _____ is site of protein synthesis.

ribosome

The fluid found inside the Chloroplast and outside of the Thylakoids is ? Stoma Stroma Stomata None of the above

stroma

Competitive inhibitor is the one that competes with the _____ for the ______ site.

substrate, active

To prevent acid from seeping in the stomach, the stomach cells join one another via _________

tight junctions

After a Na+ K+ pump has run 11 cycles, there will be a charge difference of ______ charges across membrane. 1 55 11 0 None of the above

11

Breaking down 1 molecule of Glucose during Glycolysis, yields (mark all that apply) ? 2 molecules of ATP 2 molecules of NADH 2 molecules of Acetyl CoA 2 molecules of Pyruvate

2 molecules of ATP 2 molecules of NADH 2 molecules of Pyruvate

Breaking down 1 molecule of Glucose during Glycolysis, yields (mark all that apply) ? 2 molecules of ATP 2 molecules of NADH 2 molecules of FADH2 2 molecules of Pyruvate

2 molecules of ATP 2 molecules of NADH 2 molecules of Pyruvate

A hypotonic solution is one where there is ? A high Solute concentration inside the cell A low solute concentration inside the cell A high water concentration inside the cell A low water concentration outside the cell None of the above

A high Solute concentration inside the cell

Between Catabolism and Anabolism the energy is stored in an intermediate form known as _____

ATP

During Chemiosmosis, H+ is funneled from the inner membrane space into the mitochondrial matrix with the help of an enzyme called ______

ATP synthase

During Chemiosmosis, the enzyme ______ harnesses the fall of ______ that occurs across membrane to put together ADP and Pi, to make ATP.

ATP synthase, protons

_______ has the potential to react with water and release energy as it breaks down into ADP and ______

ATP, inorganic phosphate

ATP stand for _________

Adenosine Triphosphate

________ is an organelle in a plant cell that functions as a compartment for waste disposal.

Central Vacuole

ATP synthase plays a role during? Citric Acid Cycle Chemiosmosis Electron Transport Chain Glycolysis None of the above

Chemiosmosis

A cell that pumps out 5 sodium ions will establish the following gradient/ gradients across membrane. (WRONG) Electrical Chemical Neither Both

Electrical. both

A reaction that proceeds with a net release of energy is called ? (Mark only one answer, the most appropriate) Spontaneous Non spontaneous Exergonic Endergonic Catabolic None of the above

Exergonic

T or F: A Plant cell placed in an Isotonic Solution turns flaccid, because it loses more water than it gains. ??

False

T or F: A plant cell placed in an isotonic solution will lose water.

False

T or F: A scanning electron microscope uses a very high intensity light beam to visualize the sample under the scope.

False

T or F: During feedback inhibition the end product of a metabolic pathway acts as a stimulator for an enzyme in order for it to continue making the end product.

False

T or F: Non competitive inhibitors act by binding to the active site of the enzyme which then prevents the substrates from binding there

False

T or F: Some passive transports only occasionally use ATP to move substances across membrane.

False

T or F: Spontaneous reactions are known to happen quickly/ instantaneously.

False

Plasmodesmata is to plant cells as _______ is to animal cells.

Gap junctions

Between Glucose and Oxygen in the reaction of Cellular Respiration, ________ is the reducing agent.

Glucose

Which of the following steps take place in Fermentation. Glycolysis Citric Acid Cycle Oxidative Phosphorylation None of the above

Glycolysis

Which one of the 3 stages of Respiration happens in Cytoplasm? Glycolysis Citric Acid Cycle Oxidative Phosphorylation

Glycolysis

Which of the following will not be found in a Prokaryotic Cell ? Plasma membrane Ribosomes DNA Cytosol Golgi bodies

Golgi bodies

_______ is an example of a coenzyme. (in any state) (WRONG)

Heme (right others are too)

Where is bound Ribosome found ? (Can be more than one) Nuclear membrane Golgi bodies Rough Endoplasmic Reticulum Smooth Endoplasmic Reticulum Cytosol

Nuclear membrane Rough Endoplasmic Reticulum

The Diffusion of water molecules is called _______

Osmosis

During which of the following steps NADH turns to NAD+? Glycolysis Citric Acid Cycle Oxidative Phosphorylation None of the above

Oxidative Phosphorylation

During which of the following steps does FADH2 turns into FAD+ ? Glycolysis Citric Acid Cycle Oxidative Phosphorylation

Oxidative Phosphorylation

When a substance gains electrons, it gets _______

Reduced

To have clarity in a microscopic image such that two points in a sample are easily distinguishable a microscope must have a high ______ *I thought nothing would be on exam about microscope*

Resolution

Which of the following play a role in Protein synthesis ? (can be more than one) Cytoplasm Ribosomes Smooth ER Rough ER Lysosomes

Ribosomes Rough ER

A reaction that doesn't need an input of energy for the reactants to make products is called? Endergonic Spontaneous Anabolic Exergonic

Spontaneous

The junctions between cells found in the stomach lining are ? Desmosomes Tight junctions Plasmodesmata Gap Junctions

Tight Junctions

T or F: A Cell's Cytoplasm is negative when compared with the outside of a Cell.

True

T or F: Synthesis of ATP from ADP and Pi is and example of an Endergonic reaction.

True takes energy to make ATP

Where are pigments that function as an attractants stored in a Plant cell ? Plasma membrane Golgi bodies Lysosomes Vacuoles Cytosol

Vacuoles

The minimum energy required by a reaction to overcome the energy barrier & proceed is called the __________

activation energy

The site at which an Enzyme binds a substrate (reactant) is called the ______ site

active

Proton pump in plants is an example of both primary and secondary ________ transport and which falls under the purview of ______ transport. (WRONG)

active, passive cotransport

A molecule made of both hydrophobic and hydrophilic structures is an ________ molecule.

amphipathic

Water diffuses through integral proteins called _______ , that are found in the plasma membrane.

aquaporin

A reaction that is spontaneous will have a ______ ∆G

negative

FAD & NAD+ are examples of ________.

coenzymes

Organic cofactors are called ______

coenzymes

Free Ribosomes are found floating around in the ______ of a cell

cytosol

In a reaction that is Exergonic the ∆G will be a ______ value

negative

Thermodynamics is the discipline of science that studies ______ transfer and transformations.

energy

According to the 2nd law of thermodynamics , with every transfer or transformation of energy, there is an increase in the _______ of the universe

entropy

Toxins and poisons serve as inhibitors for ______

enzymes

The diffusion aided with the help of a transport protein is called _______ diffusion.

facilitated

Mark the odd one out. Hydrophillic Polar Ionic Hydrophobic

hyrdophobic

When a Cell is placed in Hypertonic solution, the cell will _______ water.

lose

A Sodium Potassium pump is called an Electrogenic pump because it contributes to _________

membrane potential

The thickest protein filament of the Cytoskeleton is the _______ and plays a role in maintaining cell _______

microtubule, shape