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Principles of Biology Exam 2 Questions
n/a
60
Biology
Undergraduate 1
12/07/2014

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Term
Carbohydrates, lipids, and proteins are made here. Extensive system of internal membranes.
Definition
Endoplasmic reticulum
Term
These function in collection, packaging, and distribution of molecules in the cell
Definition
Golgi bodies
Term
Oxidative metabolism takes place in this organelle
Definition
Mitochondria
Term
Molecules move through a cell membrane from an area of greater concentration to lesser concentration by way of a channel protein
Definition
Facilitated diffusion
Term
Fungi, bacteria, plantae, protista

Which is a prokaryote/
Definition
Bacteria
Term
Structure that helps prokaryotic cells attach to substrates and exchange genetic information between cells
Definition
Pili
Term
What organelle is found in plant cells but not animal cells/
Definition
Central vacuole
Term
Microtubules, actin microfilaments, intermediate filaments, pili

Which is not a cytoskeletal fiber?
Definition
Pili
Term
Diffusion, receptor-mediated endocytosis, phagocytosis, pinocytosis

Which would enable a white blood cell to ingest bacteria?
Definition
Phagocytosis
Term
Engulfing of a substance
Definition
Endocytosis
Term
Expulsion of a substance
Definition
Exocytosis
Term
Endocytosis of solid matter
Definition
Phagocytosis
Term
Endocytosis of liquid matter
Definition
Pinocytosis
Term
Objects with the capacity to move have what kind of energy
Definition
Potential
Term
Reactions that release energy are
Definition
Exergonic
Term
The _______ contains enzymes that digest worn out cells
Definition
Lysosome
Term
When a cytoplasmic vesicle fuses with the plasma membrane, and expells its contents outside the cell, this is known as
Definition
Exocytosis
Term
What process requires both a channel protein and energy?
Definition
Active transport
Term
What creates lysosomes and vesicles?
Definition
The golgi body
Term
Are ribosomes organelles?
Definition
No,.
Term
Does movement of water across the cell membrane require ATP?
Definition
No.
Term
The inhibitor binds to the active site of the enzyme.
Definition
Competitive inhibition
Term
The inhibitor binds to the allosteric site of the enzyme.
Definition
Noncompetitive inhibition
Term
Holes in leaves that allow gas exchange to occur
Definition
Stomata
Term
A flattened disk/sac in the chloroplast
Definition
Thylakoid
Term
Carbon fixation enzyme
Definition
Rubisco
Term
Substrates in photosynthesis:
Definition
Water and carbon dioxide
Term
NADPH production occurs in what stage of photosynthesis?
Definition
Photosystem 1
Term
membrane molecule that is made up of a polar region and two nonpolar fatty acid tails
Definition
Phospholipid
Term
Membrane molecule that helps polar molecules pass in and out of the cell
Definition
Transmembrane proteins
Term
Simplest cells
Definition
Prokaryotic bacteria
Term
Ribosomes, chloroplasts, nucleus, mitochondria

Which is found in a bacteria cell?
Definition
Ribosomes
Term
Functions to isolate certain chemical activities from the rest of the cell (detox)
Definition
Peroxisomes
Term
Nucleus functions as a _________
Definition
command center
Term
Nucleus stores _________
Definition
hereditary information
Term
Nucleus houses the ________
Definition
nucleolus
Term
Enzymes are catalysts because they operate to
Definition
lower activation energy
Term
Site on reactant where it binds to an enzyme
Definition
Binding site
Term
The biological world gets its energy from the:
Definition
Sun
Term
Chemical bonds store what kind of energy?
Definition
Potential
Term
First Law of Thermodynamics:
Definition
Energy can be changed from one form to another, but cannot be created or destroyed.
Term
Competitive inhibitors interfere with the _____ site of an enzyme so a _________ cannot bind.
Definition
Active; substrate
Term
An enzyme changes shape when catalyzing a chemical reaction, leading to an _________ fit
Definition
Induced
Term
Components of an ATP molecule
Definition
Ribose, 3 phosphates and 1 adenine
Term
Full range of energy in sunlight is best described as the:
Definition
Electromagnetic spectrum
Term
Overall purpose of the calvin cycle
Definition
Building organic molecules
Term
C4 photosynthesis is an adaptation to hot, dry conditions where
Definition
CO2 is fixed and concentrated in the leaf
Term
What does not influence the actions of enzymes?
Definition
Relative humidity
Term
Site on enzyme surface where reactant fits
Definition
Active site
Term
Moving objects have what kind of energy?
Definition
Kinetic
Term
Making and breaking of chemical bonds
Definition
Chemical reactions
Term
Plants use ______ and ______ kind of light, and reflect ________
Definition
Red and blue; green
Term
Where does most of the oxygen in the atmosphere come from?
Definition
Water from photosynthesis
Term
The energy to power the Calvin cycle comes from
Definition
Light-dependent reactions of photosynthesis
Term
Turns of the Calvin cycle required to make one glucose molecule
Definition
6
Term
When CO2 levels are low in the leaf, the Calvin cycle cannot work efficiently, resulting in
Definition
Photorespiration
Term
Function of the nucleolus
Definition
Ribosome subunit assembly
Term
Two organelles that may have once been independent
Definition
Mitochondria and chloroplasts
Term
Extra energy required to destabilize existing chemical bonds and initiate a chemical reaction
Definition
Activation energy
Term
After ATP is turned into ADP, what happens
Definition
It is recycled back into light-dependent reactions
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