When a plant cell, such as one from a tulip stem, is submerged in a very hypotonic solution, what is likely to occur?

Plasmolysis will shrink the interior.

Cells tend to be small, with sizes ranging between 1 and 100 mm. These small sizes help to ensure that cells have a favorable surface-area-to-volume ratio. Choose the statement that explains why a favorable surface-area-to-volume ratio is advantageous.

Higher surface-area-to-volume ratios improve the efficiency of transporting materials in and out of cells.

Lower surface-area-to-volume ratios improve the efficiency of transporting materials in and our of cells.

Higher surface-area-to-volume ratios speed up the flow of cytoplasm within cells.

Higher surface-area-to-volume ratios slow down the flow of cytoplasm within cells.

The Endosymbiotic Theory suggests that eukaryotic cells evolved when an ancient cell engulfed another, forming a permanent symbiotic relationship. Choose the evidence that best justifies this claim.

Mitochondria and chloroplasts contain circular loops of unique DNA

Both mitochondria and chloroplasts perform energy functions

Eukaryotic cells have many mitochondria

Eukaryotic cells have traits in common with archaea

A protein that is destined for the membrane would be made

on a ribosome attached to the rough endoplasmic reticulum

on a ribosome that is in the cytoplasm

Biological membranes are composed primarily of

enzymes, electron acceptors, and electron donors

monosaccharides and diasaccharides

In biological membranes, the phospholipids are arranged in a _______, with the_______.

bilayer; fatty acids pointing toward each other

bilayer; fatty acids facing outward

single layer; fatty acids facing the interior of the cell

single layer; phosphorus-containing region facing the interior of the cell

The hydrophilic regions of a membrane protein are most likely

exposed on the surface of the membrane

associated with the fatty acid region of the lipids

either on the surface or inserted into the interior of the membrane

Unit 2 AP Biology

Authored by Jessica Hosey

Biology

12th Grade

NGSS covered

Used 69+ times

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MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which statement is correct about diffusion?

It's very rapid over long distances.

It's a passive process which molecules move from a region of higher to lower concentration.

It requires an energy expenditure by the cell.

It's an active process where molecules move from a region of lower to higher concentration.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which structure is common to plant and animal cells?

central vacuole

chloroplast

wall made of cellulose

mitochondrion

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following is major cause of the size limits for certain types of cells?

evolutionary progression in cell size; more primitive cells have smaller sizes.

the need for sufficient surface area to support the cell's metabolic needs.

limitation on the strength and integrity of the plasma membrane as cell size increases

the difference in plasma membranes between prokaryotes and eukaryotes

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

White blood cells engulf bacteria through what process?

pinocytosis

osmosis

phagocytosis

exocytosis

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, distilled water-equal to the volume of blood lost-is transferred directly into one of his veins. What will be the most probable result of this transfusion?

The patient's red blood cells will shrivel up because the blood fluid has become hypertonic compared to the cells.

The patient's red blood cells will shrivel up because the blood fluid has become hypotonic compared to the cells.

It will have no unfavorable effect as long as the water is free of viruses and bacteria.

The patient's red blood cells will swell because the blood fluid has become hypotonic compared to the cells.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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

glycogen

cellulose

proteins

lipids

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

CO₂

an amino acid

starch

glucose

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