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