possible multiple choice questions

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Which types of compounds are NOT classified as carbohydrates

Oils

Animal cells maintain their shape by having...

cytoskeleton

True or false: an ion is formed if an electron is lost or gained

True

Which of the following is an example of osmosis?

Water moving into the root cells of a plant

A semi-permeable membrane is stretched across a chamber filled with water. The membrane is only permeable to water. 60 mg of salt is added to the left side. What will happen?

Water will move to the left side

Why would it be impossible to live without nucleic acids?

You would have no genetic information

How is a specific enzyme able to catalyze a reaction?

An enzyme can only bind with specific substrates of the reaction catalyzed

True or false: a hydrogen bond is stronger than an ionic bond

False

True or false: protons are shared or transferred in a bond

False

A monomer for a lipid is

Fatty acid

The monomer of proteins contains all of the following except...

Glycerol

When electrons are transferred between two atoms, what kind of bond is formed?

Ionic

If you see a cell under a microscope that has mitochondria and Golgi bodies then u know that...

It must be a eukaryote

Bears eat all summer to store energy for the winter hibernation. Which of these are their main energy source?

Lipids

Which of the following organic compounds are critical components of cell membranes?

Lipids

An enzymes role in cellular reactions is to...

Lower activation energy in order to increase the rate of reactions

Tay-Sachs is a disorder in which lipids are not properly digested. Which of these organelles is not functioning properly in people with this disorder?

Lysosomes

Which of the following characteristics best explains why humans sweat when their body temperature rises significantly?

Maintaining a stable internal environment

What organelle is found in cells like muscle cells which require lots of energy?

Mitochondria

A microscope has 10x and 15x eyepieces, and 10x and 44x objective lenses. What's the max magnification?

660x

The diffusion of a substance into or out of a cell requires...

A concentration gradient mitochondrion

Which of the following describes an atom?

A core of protons and neutrons surrounded by electrons

Monomer of proteins

Amino acids

Hydrogen bonds form...

Between the hydrogen and oxygen atoms of different water molecules

Which of the following helps maintain relatively constant pH levels within an organism?

Buffers

If scientists search other planets for life, they're most likely to focus on the presence of molecules containing which element?

Carbon

The element found in ALL organic compounds on earth is

Carbon

Nucleic acids contain which of the following elements?

Carbon, nitrogen, oxygen, hydrogen, and phosphorus

Which of the following is not a component of the monomer of nucleic acids

Carboxyl group

The exchange of oxygen and carbon dioxide between the body and the air occurs in the lungs. This exchange of gases takes place at the cellular level. What part of the cell is primarily responsible for this exchange?

Cell membrane

Which of the following is NOT one of the main components of the cell theory?

Cells must contains DNA

What kind of property of water allows bugs to stay on top of water

Cohesion

What is found in all cells?

DNA, ribosomes, cytoplasm, cell membrane

Which part of the microscope regulates the amount of light that reaches the objective lens?

Diaphragm

Cell missing lysosomes would have difficulty in doing what?

Digesting food

Facilitated diffusion ____________ require energy and uses the help of ___________

Does not, transport proteins

The orbits surrounding the nucleus of an atom contain?

Electrons

Which is required of all living things?

Energy

Amino acids, sugars, and ions move across the cell membrane. Their movement from areas of high concentration to areas of low concentration is accomplished with the help of special proteins in the cell membrane. What terms applies to this type of cell transport?

Facilitated diffusion

The following characteristics define what type of cell: is surrounded by a rigid coat of cellulose, contains mitochondria and chloroplasts, has a well defined nuclear membrane, and has DNA

Plant cell

What kind of bond connects the atoms within a water molecule

Polar covalent

Characteristic of all living things?

Reproduce sexually or asexually

Which is an organelle found in the cytoplasm?

Ribosome

What effect does salt used to melt snow have on plants?

The plants will die because the saltwater that forms when the snow melts is hypertonic to the plant cells and the plant will lose water and shrivel

Which of the following is the best explanation for the formation of hydrogen bonds in water

The polarity of a water molecule

A dependent variable is best described as...

The variable that is measured

The pH of a substance is 3. Which of the statements is true?

There is a greater concentration of H+ ions in this substance

What is NOT true about prokaryotes

They contain membrane bound organelles such as chloroplasts, vacuoles, and lysosomes

What's the function of vesicles

To transport water, salt, and molecules to the cell membrane

Which term best describes a solution with a pH of 5

acidic

Monomer of carbohydrates

monosaccharides


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