Chapter 2 Test Flashcards by c j

Q

Water sample with a pH of 10 is considered what?

A

A base

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Q

Atoms have an equal number of?

A

Protons and electrons

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Q

Basic unit of matter?

A

Atom

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Q

What elements are carbohydrates made of?

A

Carbon, hydrogen, and oxygen

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Q

What ratio are carbohydrates elements

A

1:2:1

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Q

A glass of water is held together by

A

Hydrogen bonds

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Q

What are 3 functions of lipids?

A

Stores energy

Part of cell membrane

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Q

Atoms, same element, different count of neutrons

A

Isotopes

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Q

What are single sugars called?

A

Monosaccharides

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Q

Nucleotides consist of

A

Phosphate
Nitrogenous base?
5-carbon sugar?

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Q

Where are neutrons?

A

In the nucleus

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Q

Group of macromolecules that contain nitrogen, carbon, etc.

A

Proteins

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Q

Amino acids. One end has carboxyl the other has?

A

Amino group

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Q

What are the types of nucleic acids?

A

RNA & DNA

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Q

Energy needed to start reactions

A

Activation energy

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Q

Living things contain

A

Carbon

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Q

Chemical reaction

A

Reactants enter, product leaves

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Q

Endergonic

A

Not spontaneous
Uphill
Requires energy

Q

Proton have what kind of charge?

A

Positive

Q

Proteins that act as biological catalase

A

Enzyme

Q

4 things that cause protein to unravel

A

Temperature
pH
Pressure
Salt

Q

Gecko example crawling up walls uses what?

A

Van der Waals force

Q

Smallest unit of compounds

A

Molecule

Q

Substance that speeds up activation energy

A

Catalase

Attraction of similar molecules

Cohesion

Positively +negatively charged atoms

Ions

1 or more electrons transferred from one atom to another

Ionic bonds

Uneven distribution of molecules

Polar

Electrons shared between atoms

Covalent bonds

Substance dissolved in solvent to create solution

Solute

Substance in which solute in dissolved

Solvent

Pure substance with one atom?

Element

Mixture between water and no dissolved

Suspension

Substance formed

Compound

Proton + electron =?

Mass #

Center of cell is the

Nucleus

Any compound that forms?

Acids

Weak acids or bases that react with stronger ones

Buffer

Mixture of evenly dissolved molecule substance

Solution

What is the difference between carbon-14 and carbon-12

The number of neutrons

3 isotope uses

Fossil age determination Kills bacteria Cures cancer?

4 organic compounds

Lipids Carbohydrates Nucleic acid Protein

Earth is called what?

The Blue Planet