-
Viruses are made of the same four types of biological molecules as living cells. These include all of the
lipids.carbohydrates. proteins. nucleic acids. all of those besides capsids)
-
The "bead" that allows the HIV particle to attach to and enter cells is
made of protein.
-
this element is prominent in both living organisms and in the Earth's surface.
oxygen
-
The atomic nucleus consists of
neutrons and protons.
-
In an atom, the electrons are
present in various energy shells.
-
12C, 13C, and 14C are all isotopes of carbon. They differ in their
number of neutrons.
-
Because the shared electrons between hydrogen and oxygen spend more time orbiting the oxygen than the hydrogen, water is
a polar molecule.
-
Rank the following chemical bonds from weakest to strongest:
hydrogen, ionic, covalent
-
Surface tension of water is due to
hydrogen bonding
-
The internal pH of most cells is near neutral. This allows
enzymes within the cells to act at peak efficiency.
-
Joining thousands of simple sugars together through a series of chemical reactions forms polysaccharides. These are referred to as _____________ reactions.
condensation
-
The internal pH of most cells is near neutral. This allows
hydrogen bonding
-
Joining thousands of simple sugars together through a series of chemical reactions forms polysaccharides. These are referred to as _____________ reactions.
condensation
-
Examples of polysaccharides include all of the following except
sucrose.
-
Polypeptides consist of strings of amino acids held together by
peptide bonds.
-
Classes of lipids include all of the following except
carbohydrates.
-
What method is often used by cells to move large solid material into the cell?
phagocytosis
-
What method is often used by cells to move large solid material into the cell?
phagocytosis
-
What method is often used by cells to move large solid material into the cell?
phagocytosis
-
An atom in which the number of electrons is different from the number of protons is called a(n)
Ion
-
Kool-Aid readily dissolves in water. This means that Kool-Aid is
hydrophilic.
-
Kool-Aid readily dissolves in water. This means that Kool-Aid is
Ion
-
With few exceptions, organic compounds are those that contain
Viruses are not considered to be living things, although they can evolve, and they do have genetic material. However, they
-
With few exceptions, organic compounds are those that contain
Viruses are not considered to be living things, although they can evolve, and they do have genetic material. However, they
-
Viruses are not considered to be living things, although they can evolve, and they do have genetic material. However, they
cannot reproduce on their own.
-
Which of the following elements is not particularly abundant in living cells?
helium
-
Because of the atomic structure of carbon, it tends to form
covalent bonds.
-
Most cells are small. When they reach a certain size, cells typically divide. This has to do with the
a. amount of genetic material. b. Surface-to-volume ratio. c. inability to produce more components of the cell membrane. d. fact that they cannot possess sufficient numbers of organelles for normal cell functioning. e. differences between viral particles and eukaryotic cells.
-
Hummingbirds' small size allows them to hover while extracting nectar from various flowers. This same small size requires large amounts of calories to maintain body temperature because
they have a large surface area relative to their body mass.
-
A stone is pushed from the top of a hill. Halfway to the bottom of the hill, this rolling stone
has both potential energy and kinetic energy.
-
As one form of energy is converted into another, there is always some energy lost as
heat
-
Substances that start chemical reactions are called
reactants.
-
In a cell
energy-releasing reactions are coupled to energy-absorbing reactions.
-
The most common energy-carrying molecule in the cell is
ATP
-
All enzymes act by
lowering the activation energy of specific chemical reactions.
-
The active site of an enzyme
binds the reactants of a chemical reaction.
-
The majority of ATP produced in cellular respiration is produced during
the electron transport chain.
-
What process occurs in both the aerobic and anaerobic pathways?
glycolysis
-
The role of oxygen in cellular respiration is to
act as the final electron acceptor.
-
The main purpose of fermentation reactions is to
regenerate the electron carriers needed for glycolysis.
-
In photosynthesis, the light-dependent reactions
produce ATP and NADPH.
-
The chemical reactions associated with metabolism
are energy absorbing and energy releasing.
-
The chemical reactions associated with metabolism
are energy absorbing and energy releasing.
-
The chemical reactions associated with metabolism
are energy absorbing and energy releasing.
-
Almost all enzymes are,
protein
-
Which of the following is not a product of cellular respiration?
oxygen
-
How many turns of the Krebs cycle are necessary to completely break down one molecule of glucose?
2
-
Which of the following does not take place during the first of the two phases of photosynthesis?
Carbon dioxide is fixed.
-
Hummingbirds break down (oxidize) glucose and other food molecules during cellular respiration. The carbon atoms in these organic molecules are released as ____________during the _____________.
carbon dioxide, Krebs cycle
-
The primary energy carrier between the Krebs cycle and the electron transport system is a. carbon dioxide.
nadh
-
choose the process that does not occur during the light-trapping phase of photosynthesis
Carbon dioxide is fixed.
-
Which color of light has the least important role in photosynthesis?
green
-
Pyruvic acid is converted to ethyl alcohol and lactic acid during fermentation because organisms
need to recycle NAD+ back to glycolysis.
-
a subtrate
fits into the active site of a specific enzyme.
-
Which of the following chemical reactions will provide most of the energy to the hummingbird so it can beat its wings 40 - 80 times a second?
ATP ADP + P
-
During the Calvin-Benson cycle, in the red Columbine plant, high-energy electrons from NADPH are transferred into a newly made 3-carbon compound. Eventually these electrons will end up as part of glucose molecules. What was the original source of these electrons in photosynthesis?
water or oxygen
-
1. Glucose sugar is converted to pyruvate. 2. Energy from high-energy electrons is released from an electron transport chain. This energy is used to make ATP. 3. The hummingbird exhales carbon dioxide and energy is primarily transferred to NADH. 4. The hummingbird beats its wings 40 - 80 times a second.A hummingbird is "drinking" nectar containing sugar from a red columbine flower. Arrange the following events to occur in the hummingbird in order from the first to last:
1, 3, 2, 4
-
Matrix
Enzyme responsible for copying the HIV RNA into a DNA copy
-
Structure surrounding the viral nucleic acids
Envelope
-
Enzyme responsible for copying the HIV RNA into a DNA copy
Matrix
-
Structure surrounding the viral nucleic acids
envelope
-
The outer portion of the viral particle
RNA
-
Type of molecule in which HIV genetic information is stored
reverse transcriptase
-
mitochondria
These break down carbon-containing molecules to make ATP.
-
golgi apparatus
Modification of proteins takes place, often determining the final destination for these proteins.
-
Proteins are made on these.
Ribosomes
-
The genetic material is stored here.
nucleus
-
Lipids and phospholipids are produced here.
smooth endoplasmic reticulum
-
Ionic bonds
- Characteristic of sodium and chloride
- Characteristic of an atom with 7 electrons in its outer shell
-
Covalent bond
- Characteristic of a single water molecule
- Characteristic of carbon atoms
-
hydrogen bonds
Characteristic of adjacent water molecules
-
-
Nucleic acids classifications
-
Lipid classification
monounsaturated fats
-
Glycolysis produces _ATP molocules in
2 rounds
-
Krebs cycle produces _ATP molocules in
2
-
electron transport chain produces _ATP molocules in
32
-
alcholic and lactic acid Fermination produces _ATP molocules in
2 turns
-
light-independent reactions
This process requires CO2.
-
This process can lead to the production of ethanol.
Fermentation
-
Krebs cycle
Many of the molecules are intermediates in other pathways.
-
light-dependent reactions
Certain pigments play a role.
-
electron transport
The majority of ATP from cellular respiration is produced during this process.
-
electron transport chain in the mitochondria
Most of a cell's ATP is produced during this cellular process.
-
Calvin-Benson cycle
Glucose is produced.
-
Fermentation
Two ATP are produced and NAD+ is recycled.
-
Fermentation
Two ATP are produced and NAD+ is recycled.
-
light trapping phase of photosynthesis
Water is split and ATP and NADPH are produced.
-
glycolysis
Glucose is oxidized to pyruvate.
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