BIO EXAM 2 HW

Spontaneous reactions have a ΔG

negative

Where is bound Ribosome found ?

nuclear membrane rough er

The DNA in a Prokaryotic cell is found in a region called

nucleoid

Those that can only survive in aerobic conditions are aerobes.

obligate

The Diffusion of water molecules is called

osmosis

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

NADH and FADH2 are coenzymes is their _______ states.

reduced

NADPH is the state of the coenzyme.

reduced

When a substance gains electrons, it gets

reduced

To have clarity in a microscopic image such that two close points in a sample are easily distinguishable, a microscope must have high

resolution

The organelle called __________ are sites of proteins synthesis

ribosomes

Which of the following play a role in Protein synthesis ?

rough er ribosomes

The fluid found inside the Chloroplast and outside of the Thylakoids is ?

stroma

The junctions between cells found in the stomach lining are ?

tight junctions

Activation energy is needed by both Spontaneous and Non-spontaneous reactions.

true

_______ is an organelle in a cell that functions as a compartment for waste disposal

vacuole

Where are pigments that function as an attractants stored in a Plant cell ?

vacuoles

After a Na+ K+ pump has run 11 cycles, there will be a charge difference of ______ charges across membrane.

11

Breaking down 1 molecule of Glucose during Glycolysis, yields

2 pyruvate 2 atp 2 NADH

Pyruvate has how many carbons?

3 carbons

A hypotonic solution is one where there is ? (mark all those which hold true)

A high Solute concentration inside the cell

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

ATP; Pi

ATP stand for

Adenosine Triphosphate

During which of the following steps FAD turns to FADH2 ? Glycolysis Citric Acid Cycle Oxidative Phosphorylation None of the above

Citric Acid Cycle

FAD & NAD+ are examples of

Coenzymes

Which of the following is not a component of Chloroplasts? Thylakoid membrane Granum Cristae Stroma

Cristae

The junctions between cells that help them interlock to prevent tear and strain are? Desmosomes Tight junctions Plasmodesmata Gap junctions

Desmosomes

All spontaneous reactions happen both, without input of energy and quickly.

False

Spontaneous reactions are known to happen quickly/ instantaneously

False

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

False

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

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

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

Glycolysis

An animal cell placed in a hypotonic solution will become ? Plasmolysed Lysed Flaccid Turgid Shrieveled

Lysed

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

NAD

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

Oxidative Phosphorylation

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

Spontaneous

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

Substrate; active site

T or F The hydrolysis of ATP is an Exergonic reaction.

True

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

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

Anabolic reactions ________ ATP.

need

A cell that pumps out 5 sodium ions will establish the following gradient/ gradients across membrane.

chemical and electrical

ATP synthase plays a role during.

chemiostasis

organic cofactors are called

coenzymes

Free Ribosomes are found floating around in the ________ of a Cell.

cytosol

A reaction that is spontaneous will have a _______ ∆G

negative

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

A reaction that proceeds with a net release of energy is called ? (Mark only one answer, the most appropriate)

exergonic

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

facilitated

A Plant cell placed in an Isotonic Solution turns flaccid, because it loses more water than it gains.

false

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

false

ATP and NADPH are made during Calvin cycle.

false

ATP synthase is an enzyme that carries out hydrolysis of ATP.

false

During diffusion molecules move from low to high concentration.

false

Some passive transports only occasionally use ATP to move substances across membrane.

false

Unlike animals cells, all bacteria's have cell wall.

false

A Plant cell placed in a Isotonic solution will be

flaccid

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

lose