Quizizz #14 (2021) LE

Certain seaweeds contain a greater concentration of iodine inside their cells than there is in the seawater surrounding them. The energy required to maintain this concentration difference is most closely associated with the action of

• ribosomes

• mitochondria

• vacuoles

• nuclei

Answer explanation

to build a high concentration of iodine, cells must do active transport, which requires ATP energy - made in the mitochondria

An ameba is a single-celled organism. It uses its cell membrane to obtain food from its environment, digests the food with the help of organelles called lysosomes, and uses other organelles to process the digested food. From this, we can best infer that

• all single-celled organisms have lysosomes to digest food

• amebas are capable of digesting any type of food molecule

• single-celled organisms are as complex as multicellular organisms

• structures in amebas have functions similar to organs in multicellular organisms

Answer explanation

Tip - answers with ALL or EVERY are usually wrong. A common regents concept is that organelles serve similar purposes to organs.

A cell with receptors for two different hormones is represented. Which chemical would most likely interfere with the activity of hormone A, but not hormone B?

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Answer explanation

Look for a shape that will bind with receptor A. While that shape is in the receptor, somethings else cannot bind with the receptor. A looks like it can hold a circle.

The diagram represents the organization of structures within an organism. Which term best indicates the structures represented by the circle labeled X?

• organelles

• chromosomes

• organ systems

• tissues

The diagram represents a portion of a cell membrane. The arrow indicates that the cell membrane is carrying out the process of

• respiration

• cell recognition

• diffusion

• active transport

Answer explanation

Molecules move from low --> high concentration using ATP energy

Which statement concerning the structures within this cell is accurate?

• Structure 1 is a chloroplast that carries out photosynthesis.

• Structure 2 is a vacuole that contains DNA.

• Structure 3 is a mitochondrion, where respiration takes place

• Structure 4 is the cell membrane, which provides rigid support for the cell

Answer explanation

Looks like a never-ending "M" REMA - respiration, energy, mitochondria, ATP

The human body has many cells that are deep inside the body. For this reason, the human body requires

• a transport system and other organs

• carbon dioxide from the air

• the synthesis of many inorganic compounds

• the breakdown of glucose by the digestive system

Answer explanation

the (circulatory system) heart/blood work together to deliver food/nutrients/remove wastes to many cells in the body

The diagram represents two types of carbohydrate molecules, glucose and sucrose. Which is more likely to be able to cross a cell membrane, and why

• Glucose, because it is larger

• Glucose, because it is smaller

• Sucrose, because it is larger

• Sucrose, because it is smaller

As fi sh are frozen for storage, the water in the cells expands as it cools from 4°C to 0°C and may cause cells to burst. This lowers the quality of the fi sh. Why would soaking the fish briefly in salt water before freezing them might prevent this damage to the cells

• A salt solution would cause water to diffuse out of cells before freezing

• A salt solution has not effect on water content of cells

• A salt solution would causes water to diffuse into the cell before freezing

A cube cut from a potato is placed in a beaker of distilled water. The potato cells have a relatively high concentration of starch and a relatively low concentration of water. The diagram represents the water and starch molecules in and around one of the potato cells in contact with the water in the beaker.

Which choice correctly describes what would be expected to occur in the potato cells, with regard to both the starch and water molecules?

• More water will move into the cell than will leave the cell. Starch will remain inside the potato cell.

• More water will leave the cell than will enter. Starch will move out of the cell

• Water content of the cell will not change. Starch will move out of the cell.

• More water will leave the cell than will enter. Starch will remain inside the potato cell.

Answer explanation

Starch stays where it starts.

Count water molecules, there is more outside the cell, so water will diffuse into the cell