What structure do phospholipids form at the cell surface?
A lipid bilayer.
What is the storage form of glucose in animals?
Glycogen.
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Lipids

What structure do phospholipids form at the cell surface?

A lipid bilayer.

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Polysaccharides

What is the storage form of glucose in animals?

Glycogen.

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Nucleic Acids

What sugar is found in RNA?

Ribose.

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Nucleic Acids

What is a gene?

A discrete unit of inheritance that programs the amino acid sequence of a polypeptide.

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Nucleic Acids

What are the two types of nucleic acids?

DNA and RNA.

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Carbon

What are living organisms primarily composed of?

Carbon-based compounds.

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Amino Acids

What are amino acids?

Building blocks of proteins.

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Protein

What determines the uniqueness of a protein?

The combination of different amino acids.

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Fats, Phospholipids, Steroids, Cholesterols

What is the structure of a steroid?

A carbon skeleton consisting of four fused rings.

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Carbohydrates

What is the general formula for carbohydrates?

C_nH_{2n}O_n.

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Lipids

What type of tails do phospholipids have?

Hydrophobic hydrocarbon tails.

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Protein

What characterizes the secondary structure of a protein?

Folding or coiling of the polypeptide into a repeating configuration due to hydrogen bonding.

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Lipids

What are lipids?

A large and diverse group of organic compounds that are hydrophobic in nature.

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Lipids

What are some examples of lipids?

Fats, Phospholipids, Steroids, Waxes.

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Fats, Phospholipids, Steroids, Cholesterols

What is the primary function of fats in the body?

They are the most abundant and concentrated source of usable energy, stored in fat deposits.

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Fats, Phospholipids, Steroids, Cholesterols

What is the state of unsaturated fats at room temperature?

Liquid.

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Lipids

What are the components of a phospholipid?

A glycerol molecule joined by two fatty acids and a phosphate group.

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Carbon

Why is carbon unique in forming biological molecules?

It can form four bonds, allowing it to bond with up to four other atoms or groups.

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Carbon

What determines the properties of a carbon-containing molecule?

The arrangement of its carbon skeleton and its chemical groups.

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Nucleic Acids

What are the pyrimidine nitrogenous bases?

Cytosine, Thymine, Uracil.

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Monosaccharides, Disaccharides, Polysaccharides

What is a monosaccharide?

The basic unit of carbohydrates, usually three to seven carbon atoms long.

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Amino Acids

What is the general formula for proteins?

C H O N.

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Amino Acids

What functional groups do amino acids contain?

An amino group and a carboxyl group.

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Lipids

What part of the phospholipid is hydrophilic?

The phosphate group and its attachments.

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Carbon

Which elements does carbon commonly bond with?

Hydrogen, Oxygen, and Nitrogen.

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Nucleic Acids

What are the components of a nucleotide?

Five-carbon sugar, a nitrogenous base, and one to three phosphate groups.

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Carbohydrates

What are the classifications of carbohydrates based on the number of simple sugars?

Monosaccharides, Disaccharides, and Polysaccharides.

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Fats, Phospholipids, Steroids, Cholesterols

What is the state of saturated fats at room temperature?

Solid.

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Amino Acids

How many amino acids are there?

20 amino acids.

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Protein

What is the primary structure of a protein?

The sequence of amino acids.

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Protein

What is the tertiary structure of a protein?

The overall three-dimensional shape of a polypeptide resulting from interactions between amino acids and R groups.

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Polysaccharides

What is the storage form of glucose in plants?

Starch.

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Lipids

What important substances is cholesterol a precursor to?

Several steroid hormones and Vitamin D.

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Nucleic Acids

What sugar is found in DNA?

Deoxyribose.

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Monosaccharides, Disaccharides, Polysaccharides

What is an example of a simple sugar that is a product in glycolysis?

Glyceraldehyde.

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Fats, Phospholipids, Steroids, Cholesterols

Where do unsaturated fats primarily come from?

Plant fat.

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Carbon

What is the backbone of life?

Carbon.

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Carbohydrates

What is the general formula for disaccharides?

C12H22O11.

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Polysaccharides

What defines polysaccharides?

Macromolecules formed by a few hundred to a few thousand monosaccharides joined by glycosidic linkages.

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Lipids

What are some dietary sources of cholesterol?

Meat, eggs, and cheese.

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Lipids

What health condition may high levels of cholesterol contribute to?

Atherosclerosis.

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Fats, Phospholipids, Steroids, Cholesterols

Where do saturated fats primarily come from?

Animal fat.

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Fibrous/Structural & Globular/Functional Protein

Give examples of fibrous/structural proteins.

Collagen, tendon, keratin.

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Nucleic Acids

What is the primary function of nucleic acids?

To store, transmit, and help express hereditary information.

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Nucleic Acids

What sugar base is found in RNA?

Ribose.

p.8
Nucleic Acids

What are the building blocks of nucleic acids?

Nucleotides.

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Protein

What is the quaternary structure of a protein?

Association of two or more polypeptides.

p.8
Nucleic Acids

What is a nucleoside composed of?

A five-carbon sugar and a nitrogen-containing base.

p.5
Protein

What does the term 'protein' derive from?

The Greek word 'proteios', meaning 'first' or 'primary'.

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Fibrous/Structural & Globular/Functional Protein

What is the function of fibrous/structural proteins?

Binding structures together and providing strength in certain tissues.

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Nucleic Acids

What are nucleic acids composed of?

Polymers of nucleotides.

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Nucleic Acids

What are the three main forms of RNA?

Messenger, ribosomal, and transfer.

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Lipids

Where is cholesterol synthesized in humans?

In the liver.

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Fats, Phospholipids, Steroids, Cholesterols

What is another name for fats?

Triacylglycerol or triglyceride (TAGs).

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Fats, Phospholipids, Steroids, Cholesterols

What distinguishes saturated fats from unsaturated fats?

Saturated fats have no double bonds between carbon atoms, while unsaturated fats have one or two double bonds.

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Protein

What percentage of cellular dry weight do proteins account for?

Almost 50%.

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Fats, Phospholipids, Steroids, Cholesterols

What is the primary function of most steroids?

To act as chemical messengers or hormones.

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Disaccharides

What are two examples of disaccharides?

Maltose (Malt Sugar) and Lactose (Milk Sugar).

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Carbohydrates

What are the main functions of carbohydrates?

They serve as fuel and building material.

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Polysaccharides

What is the main component of the plant cell wall?

Cellulose.

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Amino Acids

How many amino acids commonly make up proteins?

20 amino acids.

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Nucleic Acids

What are the nitrogenous bases found in RNA?

Cytosine, Uracil, Adenine, Guanine.

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Lipids

What elements are found in the structure of lipids?

Carbon, Hydrogen, and Oxygen atoms.

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Nucleic Acids

What are the purine nitrogenous bases?

Adenine, Guanine.

p.5
Protein

What are proteins defined as?

Polymers assembled from amino acids linked by peptide bonds.

p.5
Fibrous/Structural & Globular/Functional Protein

Give examples of globular/functional proteins.

Enzymes, Hemoglobin, antibodies.

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Fibrous/Structural & Globular/Functional Protein

What characterizes globular/functional proteins?

They are mobile, generally spherical molecules crucial for biological processes.

Study Smarter, Not Harder
Study Smarter, Not Harder