Which of the following statements is part of the cell theory?

All cells are produced from existing cells.

Cells are composed mostly of empty space.

Cells are generally large enough to be seen with the unaided eye.

Only animals are made up of cells.

All cells contain cell membranes. Which of the following describes the composition of the cell membrane?

Cell membranes are composed of lipid molecules, which provide a flexible, fluid structure.

Cell membranes are composed of carbohydrate chains, which allow ALL materials to enter and leave the cell.

Cell membranes are composed of cellulose, which provides a rigid support structure for the cell.

Cell membranes are composed of cytoplasm, which allows proteins to be released from the cell.

Which organelles allow plants to support heavy stuctures, such as leaves and flowers?

the vacuoles, because they fill with fluid and provide rigidity

the chloroplasts, because they convert sunlight into chemical energy

the cell membranes, because they regulate what enters and leaves the cell

the golgi apparatus, because it packages proteins for storage in the cell

The illustration shows a model of the transport of solute particles from outside the cell to inside the cell. What type of cell transport is modeled?

Active transport, because energy is required for the solute particles to cross the membrane

Diffusion, because solute particles are moving from an area of high concentration to low concentration

Facilitated Diffusion because protein channels allow solute particles to cross the membrane

Osmosis, because water molecules are moving from high concentration to low concentration

Which pair of organelles works together to give structure and support to animal cells?

endoplasmic reticulum and cell membrane

Which characteristic of prokaryotic organisms makes them different from eukaryotes?

Prokaryotic cells do not have membrane-bound organelles

Prokaryotes do not have chromosomes

In the carbon cycle, carbon is taken in by plants

as carbon dioxide in the process of photosynthesis.

as water vapor in the process of photosynthesis.

as carbon dioxide in the process of decomposition.

Why is nitrogen important to plants?

Nitrogen is needed to build proteins and enzymes.

Nitrogen controls the uptake of water in roots.

Nitrogen is the only element that plants need.

Why are bacteria an important part of the nitrogen cycle?

they convert nitrogen into usable forms

they help plants create protein

they create carbon dioxide and water

Nucleic acids are one of the four major macromolecules. The main functions of nucleic acids are to

carry genetic material and create structures inside the cell.

act as enzymes, cell signals, and structural support for the cell.

store and transport energy and structural components in the cell.

Enzymes are catalysts. This means that they are able to speed up chemical reactions. Which of the following statements is also true of enzyme catalysts?

They decrease the activation energy needed for the reaction to occur.

They increase the energy that is released by reactions.

They must be continuously replaced after each catalyzed reaction.

Each enzyme produced by the body is

specific—meaning it is only able to catalyze a reaction with a certain molecule.

incomplete—meaning it requires other parts before it is able to bind to a molecule.

open—meaning it is able to catalyze a reaction with any molecule.

Carbohydrates are composed of which three elements?

carbon, hydrogen, oxygen and nitrogen

carbon, hydrogen, oxygen, nitrogen and phosphorus

All of the following are important, life-sustaining property of water, except

ability to moderate temperature

Nucleic acids, proteins, and other large biological molecules are known as polymers because

they contain many small, repeating sub-units bonded together.

they all have the capability of functioning as enzymes.

they all contain only ionic bonds.

What property of water molecules allows hydrogen bonds to form among adjacent molecules?

The polarity of the molecule, which involved a slightly negative oxygen atom and slightly positive hydrogen

The strong covalent bonds that hold the oxygen atom to each hydrogen atom

The ionic bonds that form after the molecule separates into a hydroxide (OH-) and hydrogen ion (H+)

Household bleach has a pH between 12 and 13. From this information, which of the following BEST describes the bleach solution?

The solution is basic, meaning it has fewer hydrogen (H+) ions than hydroxide (OH–) ions

The solution is acidic, meaning it has more hydrogen (H+) ions than hydroxide (OH–) ions

The solution is neutral, meaning it has an equal number of hydrogen (H+) ions and hydroxide (OH–) ions

The three particles that make up an atom are

Protons, Neutrons and Electrons

Positives, Negative and Electrons

Neutrons, Isotopes and Electrons

Ecology Final Exam-2024

Authored by Jodi Schmidt

Biology

9th Grade

Used 2+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When you step out into the cold, your body shivers in order to keep its temperature at 98.6 degrees F. Which of the following characteristics of life are you exhibiting?

All living things use energy

All living things maintain homeostasis

All living things contain cells

All living things grow

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The diagram below shows a T4 bacteriophage. This virus consists of a single strand of DNA enclosed in a protein capsule. It reproduces with aid of another organism's DNA and cellular process, but not on its own. Is it alive?

No, because it doesn't move.

No, because it is missing one of the characteristics of living things.

Yes; since the virus contains DNA, it is a living organism.

Yes; since the virus contains protein, it is a living organism.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Green plants produce their own food through the process of photosynthesis. Which characteristic of life are they exhibiting?

All living things use energy

All living things maintain homeostasis

All living things contain cells

All living things grow

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement best explains why these cells have structural differences?

The cells have differentiated, therefore having different functions/appearances.

They are stem cells.

One of the cells develops into the other type of cell.

One of the cells came from a unicellular organism.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Life functions are performed at many levels of biological organization. Which level of biological organization is the simplest level at which a structure can support life functions?

cell

tissue

organelle

organ

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which level in a food web contains the highest amount of total available energy?

secondary consumer

decomposer

producer

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following living things would be found closest to the beginning of a food chain?

scorpion

mushroom

caterpillar

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Ecology Final Exam-2024

When you step out into the cold, your body shivers in order to keep its temperature at 98.6 degrees F. Which of the following characteristics of life are you exhibiting?

The diagram below shows a T4 bacteriophage. This virus consists of a single strand of DNA enclosed in a protein capsule. It reproduces with aid of another organism's DNA and cellular process, but not on its own. Is it alive?

Green plants produce their own food through the process of photosynthesis. Which characteristic of life are they exhibiting?

Which statement best explains why these cells have structural differences?

Life functions are performed at many levels of biological organization. Which level of biological organization is the simplest level at which a structure can support life functions?

Which level in a food web contains the highest amount of total available energy?

Which of the following living things would be found closest to the beginning of a food chain?

Based on the food chain shown above, energy in this ecosystem flows from

Which level in the diagram below represents the primary consumers?

Examine the food web below. Which organisms in the food web are primary consumers?

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