Create an account
Microfilaments such as actin, microtubules, and intermediate filaments form the cell supporting structure called...
Animal cells excrete glycoproteins outside of the plasms membrane to produce a _____ which is directly linked to the cytoskeleton.
What cytoskeleton filament has a tough, rope-like structure, and is not able to rapidly polarize or depolarize?
The part of the membrane that extends through the phospholipid bilayer is primarily composed of amino acids that are _____
A phospholipid has a polar end and a nonpolar end. Because of this, water molecules form...
hydrogen bonds with the polar end of the phospholipid molecule
While water continually orients phospholipids into a lipid bilayer, it does not fix the lipids permanently into position. Thus the bilayer is considered to be _____ in nature.
A type of transport of a solute across a membrane, up its concentration gradient, using protein carriers driven by the expenditure of chemical energy, is known as...
If you were a macrophage, which process would you use to engulf and destroy foreign particles?
Enzymes are very specific in their choices of substrates because each different enzyme has an active site that...
Is shaped to fit a certain substrate molecule
In an experiment described in a chemistry lab book, the directions state that after mixing chemicals A and B and waiting 5 minutes, that A will be oxidized. This means that...
Chemical A has lost electrons to chemical B
One type of biochemical pathway regulation is referred to as feedback inhibition. This means that as the...
Cell produces more quantity of product through a biochemical pathway, the build-up of that product will inhibit the activity of that product's production
When oxygen is limiting, during heavy exercise, muscle cells revert to ______ fermentation for energy production.
Regardless of the electron or hydrogen acceptor used, one of the products of fermentation is always...
What is the correct sequence concerning glucose catabolism?
Glycolysis -> Pyruvate -> Acetyl CoA -> Krebs Cycle -> Electron Transport Chain
In eukaryotic cells, after glycolysis, all of the remaining reactions of glucose oxidation take place in the....
In the Krebs cycle, what does not take place?
Pyruvate molecules are restored to the beginning of the Krebs cycle
In aerobic respiration, one of the products of is CO2. Which of the following parts of aerobic respiration generates CO2?
Pyruvate oxidation and the Krebs cycle
In mitochondria, chemiosmotic generation of ATP is driven by...
a difference in H+ concentration on the two sides of the mitochondrial inner membrane.
The components of the electron transport chain are located in the...
Inner membrane of the mitochondria
The general process whereby protons accumulate on one side of a membrane and can flow back across the membrane through ATP synthase resulting in ATP production is called _________________.
The energy released in the mitochondrial electron transport chain is used to...
Develop a H+ gradient across the inner mitochondrial membrane
In the dark reactions of photosynthesis, CO2 is added to a five-carbon sugar-phosphate known as...
When ATP levels are high, oxidative pathways are inhibited, so acetyl-CoA is channeled into...
Fatty Acid Synthesis
Most plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the...
Chlorophyll b absorbs in green wavelengths of light that chlorophyll a cannot absorb. In this respect, chlorophyll b acts as...
The dark (light-independent) reactions of photosynthesis are those that...
Convert CO2 into reduced molecules (sugars)
In the Calvin cycle, when CO2 is released without producing ATP or NADPH, this process is called...
Most of the atmospheric oxygen occurs as a result of photosynthesis. From what molecules is the oxygen derived?
A method devised by succulent desert plants to reduce the problem of photorespiration is...
The CAM metabolism
The most distinctive characteristic of leaf mesophyll cells is that they are filled with...
A birdhouse is nailed into a tree 6 feet up from the ground. If the tree grows about 2 feet taller each year, where will the birdhouse be 25 years later?
How could you distinguish between a root hair versus a very small root?
Root hairs are parts of single cells, roots are multicellular
In the plants that utilize the CAM pathway, what happens to the stomata?
The stomata open in the evening but close in the morning.
The waterproof cuticle covering the epidermis of land plants helps prevent dehydration, much like the skin of some land animals. As a consequence, what other evolutionary adaptation was important for most land plants?
Stomates in the leaves
Plants, and their predecessors, green algae, do not share the property of
Having a system of roots and stems
Plants show a basic life cycle which involves the alternation of generations between a(n)...
Sporophyte and Gametophyte
Which of the following was a key innovation specifically involved in the evolution of large plants?
Which of the following statements about Angiosperms would be false?
Free water is required for pollination
The following vascular tissue transports sugars and amino acids from the leaves to other parts of the plant...
On a short-term basis, water loss in plants may be controlled by the...
Closing of the stomates in the leaves to limit transpiration.
The process of moving water through a plant by transpiration works because water molecules stick to each other through...
What are the three domains of life?
Prokarya, Eukarya, and Archaea; animals, plants. and fungi are part of the domain Eukarya.
When atoms gain or lose electrons, they become negatively or postively charged and are known as...
Water molecules are polar with ends that exhibit partial positive and negative charges. Such opposite charges make water molecules attract each other through bonds called...
All atoms tend to fill their outer energy levels with the maximum number of electrons, usually eight. Depending on whether the atoms satisfy this simple octet rule or not will allow the prediction of....
The Chemical behavior of the atoms
Nonpolar molecules tend to aggregate in water because they are forces to come into close proximity with each other due to...
This atom in its unbound state has four valence electrons. These electrons readily form single, double, and triple bonds among themselves to become stable. This atom is...
Humans are unable to get metabolic energy from cellulose because
They do not have the enzyme necessary to seperate the glucose monomers from the cellulose.
Imagine that you were able to see a nucleotide under a high-powered microscope. As you scan the nucleotide you see a U nitrogen base. Without seeing any other part of the nucleotide you know that...
It is either a DNA nucleotide or an RNA nucleotide.
The delivery system of eukaryotic cells called the ______ can collect, package, modify, and transport molecules.
The Cell Theory states that the cell is the basic unit of life, all organisms are composed of one or more cells, and ....
All cells arise from division of previously existing cells.
The Cell Theory states that the cell is the basic unit of life, all organisms are composed of one or more cells, and...
All cells arise from division of previously existing cells
Cells tend to be very small because...
As they get bigger, their volume increases much faster than their surface area
Cell of your salivary glands, which secrete lots and lots of protein, would most likely contain a lot of...
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together