Quizizz Week #22

During cellular respiration, what is the direct source of the energy used in the cells of consumers in the ecosystem represented below?

• the Sun

• enzymes

• the atoms making up inorganic molecules

• the chemical bonds in organic molecules

Molecules A and B are commonly found in plant cells. When tested, it was discovered that molecule A quickly passed through the artificial plant cell membrane. Molecule B did not pass through.

The locations of molecules A and B at the beginning of the experiment are shown. Which statement best describes what was observed when the setup was examined 20 minutes later?

• Molecule A remained inside the artificial cell and molecule B remained outside.

• Only molecule A was found both inside and outside the artificial cell.

• Only molecule B was found both inside and outside the artificial cell.

• Both molecules A and B were found inside and outside the artificial cell.

Mad cow disease is a fatal disease that destroys brain tissue. Researchers have found that a prion protein, which is an abnormally constructed molecule, is responsible. Which statement best describes the characteristics a protein must have to function correctly?

• A protein is a long chain of amino acids folded into a specific shape.

• A protein is a long chain of simple sugars folded into a specifi c shape.

• A protein is made of amino acids synthesized into a short, circular chain.

• A protein is made of simple sugars synthesized into a short, circular chain.

The reproductive structure in a female mammal that produces sex cells is the

• ovary

• placenta

• testes

• uterus

The diagram below represents a laboratory experiment involving sucrose and water molecules in a cellophane bag which functions in the same way as dialysis tubing.

Which statement correctly explains the rise of liquid in the tube at the end of the experiment?

• The concentration of sucrose molecules increased as water molecules entered the bag. This concentration increase pushed the liquid up the tube.

• Water entered the bag due to the lower concentration of water inside. The extra water pushed the liquid up the tube as the bag filled.

• Sucrose indicator entered the bag and reacted with the sucrose molecules. The reaction made the bag increase in size and pushed the liquid up the tube.

• Sucrose molecules moved out of the bag and up the tube while water moved out, causing the rise of liquid in the tube.

Anhidrosis is the inability to sweat normally. If the human body cannot sweat properly, it cannot cool itself, which is potentially harmful. Anhidrosis most directly interferes with

• a feedback mechanism that maintains homeostasis

• an immune system response to harmless antigens

• the synthesis of hormones in the circulatory system

• the enzymatic breakdown of water in cells

Many tiny plants can be seen developing asexually along the edge of the mother-of-thousands plant leaf, as shown in the photo below. The tiny plants eventually drop to the ground and grow into new plants of the same species.

One way this form of reproduction differs from sexual reproduction is

• more genetic variations are seen in the offspring

• there is a greater chance for mutations to occur

• the offspring and the parents are genetically identical

• the new plants possess the combined genes of both parents

The process of transferring energy during respiration occurs in a series of steps. This prevents too much heat from being released at one time. Maintaining an appropriate temperature is beneficial to an organism because

• enzymes need a proper range of temperatures to catalyze vital reactions

• cellular waste products can only be excreted in cooler temperatures

• hormones can only produce antibodies if temperatures are not excessive

• nutrients diffuse faster into cells when temperatures are lower

Fruits and vegetables exposed to air begin to brown because of a chemical reaction in their cells. This may result in these foods being thrown out. Some people have found that adding lemon juice (citric acid) to apple slices keeps them from turning brown. The prevention of browning is likely the result of

• increasing the concentration of enzymes

• increasing the temperature

• slowing the rate of enzyme action

• maintaining the pH

A cell with receptors for two different hormones is represented below.

• 1

• 2

• 3

• 4