Biology 140 chap 3

Biology 140 with Sammons at University of Tennessee - Martin

About this deck

By: Latecka Quinn-Lyle
Created: 2011-09-19
Size: 22 flashcards
Views: 11

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Why does carbon form four covalent bonds?

Because carbon needs four electrons to fill its outer shell.

The bonds in methane (CH4) are ________ bonds.

nonpolar covalent

Olive oil is a liquid at room temperature and is therefore expected to have a high proportion of _____________ fatty acids.

unsaturated

What feature of phospholipids makes them polar?

One end is hydrophilic and one end is hydrophobic

Proteins are made up of...

amino acids

What do cellulose and glycogen have in common?

They are both polysaccharides

Which of the following monomers is NOT correctly matched with an appropriate corresponding polymer?

amino acid-starch

Why is carbon so important in biological systems?

Carbon can form long covalently bonded chains which can incorporate many other atoms.

Which of the following best fits the category of "polysaccharide"?

cellulose

All biologically significant nucleic acids are polymers of nucleotides held together with phosphodiester bonds.

True

Which of the following is not a biological function that can be provided by some type of protein?

There are proteins which can provide each of the above functions.

Lipids are typically dominated by nonpolar covalent bonds.

true

Which of these is a true difference between starch and cellulose?

Cellulose forms long filaments, and starch is highly branched.

Which of these are monomers of proteins?

Amino acids

A triglyceride is a form of _______ composed of ___________.

lipid; fatty acids and glycerol

Why are carbohydrates important for energy storage?

The covalent C–H bonds found in carbohydrates store energy

Isomeric differences in carbohydrates often account for substantial functional differences

true

Which of these is NOT an important biological carbohydrate?

Myoglobin

Which of these is NOT true of the five chemical classes of amino acids, based on their R group?

Amino acids that have special functions have similar properties.

Prokaryotes have nuclei but no mitochondria or chloroplasts.

false

Eukaryotes must organize their microtubules, especially during cell division. What region is responsible for serving as the microtubule-organizing center for ALL eukaryotic cells?

centrosomes

Select the membrane molecule that is made up of a polar region with two nonpolar fatty acid tails.

Phospholipids

About this deck

By: Latecka Quinn-Lyle
Created: 2011-09-19
Size: 22 flashcards
Views: 11

About StudyBlue

“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy