Ap bio

The interior of the phospholipid bilayer is

Hydrophobic

Celery stalks that are immersed in freshwater for several hours become stiff and hard. Similar stocks left in a salt solution become meant and salt. From this we can deduce that the cells of the celery stalks are

Hypertonic to fresh water but hypertonic to the salt solution

Contains hydrolytic enzymes

Hysosome

Results from a transfer of electrons between atoms

Ionic bond

A cell within internal concentration of 0.02 molar glucose is placed in a test tube containing 0.02 molar glucose solution. Assuming that glucose is not actively transported into the cell, which of the following terms describes the internal concentration of the cell related to its environment

Isotonic

A patient has found a serious accident and lost a lot of blood. In an attempt to replenish blood fluids, a large amount of distilled water was transferred directly until one of his veins. What will be the most probable results of this transfusion

It will have serious, perhaps fatal, consequences because the red blood cells will be hypertonic related to the body fluids and the cells will burst

Which of the following pairs is mismatched

Lysosomes - protein synthesis

What is the voltage across cell membranes called

Membrane potential

Which of the following is not a part of the endomembrane system

Mitochondria

One of the main energy transformers of cells

Mitochondrion

Based on your knowledge of the polarity of water, the solute define the fun molecule is most likely

Negatively charged

Olive the following molecules are part of the cell membrane except

Nucleic acid

Detoxifies alcohol in the liver

Peroxisome

The membrane activity most nearly opposite to exocytosis is

Phagocytosis

White blood cells engulf bacteria through what process

Phagocytosis

Which type of lipid is most important in biological membranes

Phospholipid

Results from an unequal sharing of electrons between atoms

Polar covalent bond

Large number of ribosomes are present in cells that specialize in producing which of the following molecules

Proteins

Which structure is the site of the synthesis of proteins that may be exported from the south

Rough ER

Of the following which is probably the most common route for membrane to flow in the endomembrane system

Rough ER- vesicles - Golgi - plasma membrane

The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because of different

Side chains (R groups)

What type of organelle is primarily involved in the synthesis of oils, phospholipids, and steroids

Smooth endoplasmic reticulum

According to the induced fit hypothesis of enzyme function which of the following is correct

The binding of the substrate changes the shape of the enzymes slightly

So can be described as having a cytoskeleton of internal structures that contribute to the shape, organization, and movement of the cell. All of the following are part of cytoskeleton except

The cell wall

In the reaction A-> B + C + heat,

The potential energy of the products is less than that of the reactant

All of the following situations are consistent with active transport except

The rate of movement of molecules across the cell membrane increases in an anaerobic environment

Which of the following is true of both starch and cellulose

They are both polymers of glucose

An animal secretory cell and they photosynthetic we still are similar and all the following ways except

They both have chloroplasts

The tertiary structure of a protein is the

Three- dimensional shape

A membrane that encloses A versatile plant compartment. Many gold reserves of organic compounds or inorganic ions

Tonoplast

The co transport protein that allows two different substances that pass through a membrane in the same direction is

Usually associated with a proton pump

The nutritional information on the cereal box shows that one serving of dry cereal has 80 calories ( actually kilocalories). If one were to burn a serving of cereal, the amount of heat given off would be sufficient to raise the temperature of 1 kg of water how many degrees Celsius

80.0 degrees Celsius

What is a fat or traicylglycerol

A lipid of three fatty acids and glycerol

Which of the following descriptions best fit the class of molecules known as nucleotides

A nitrogen base, a phosphate group, and they five-carbon sugar

A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from

A plant or an animal

Which of the following would indicate that facilitated diffusion was taking place

A substance was diffusing much faster than the physical condition indicated it should

Substance X is

A substrate

Which of the following statement is true regarding enzymes cooperativity

A substrate molecule bound to an active site effects the active site of several subunits

What would be an acceptable consequence of changing one amino acid into a particular protein

A tertiary structure might be changed, the primary structure would be changed, the biological activity of this protein might be altered

Waters high specific heat is mainly a consequence of the

Absorption and release of heat when hydrogen bonds break and form

The movement of a substance across a biological membrane against its concentration gradient with the help of energy input is which of the following

Active transport

How can one increase the rate of a chemical reaction

Add a catalyst

The hydrogenation of vegetable oil would result in

All of the above

Substance a function

An allosteric inhibitor

The active site of an enzyme is the region that

Binds with the substrate

Anabolic pathways

Both depends on enzymes and consume energy to build up polymers from monomers

Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly

CO2

A cell lacking oligosaccharides on the external surface of its plasma membrane would likely be inefficient in

Cell. Cell recognition

Cells of being able to form Julio or flagella they do not have

Centrioles

If the pH of a solution is Victoria from 7 to 6, it means that the

Concentration of H positive has increased to 10x what it was at pH 7, and concentration OH negative has decreased 10 times what it was at pH 7

The sodium- potassium pump is called an electrogenic pump because it

Contributes to the membrane potential

Mutant cells lacking coated pits would most likely be

Deficient in receptor- mediated endocytosis

Which of the following best summarizes the relationship between dehydration reactions and hydrolysis

Dehydration reactions assemble polymers, and hydrolysis breaks them down

The presence of cholesterol in the plasma membranes of some animals

Enables the membrane just a fluid more easily when they sell temperature drops

Which of the following is not found in prokaryotic cell

Endoplasmic reticulum

Which of these statements regarding enzymes is false

Enzymes provide activation energy for the reactions they catalyze

All of the following statements are representative of the second law of thermodynamic except

Every time energy changes from, there is a decrease and entropy

Glucose diffuses slowly through artificial phospholipids bilayers. The cells lining the small intestine, however, rapidly move large quantities of glucose from the glucose - rich food into their glucose - for cytoplasm. Using this information, which transport mechanism is most probably functioning in the intestinal cells

Facilitated diffusion

The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathways is known

Feedback inhibition

Plasmodesmata in plant cells are most similar in function to which the following structures in animal cells

Gap junction

Helps to recycle that sells organic material

Goji apparatus