Biochem Review Questions

61 terms by nela_breitkreutz

Create a new folder

Advertisement Upgrade to remove ads

Which one of the following is a hydrocarbon?

C3H8

Which of the following is an example of an organic molecule?

CH4

Which element is most particularly associated with organic chemistry?

Carbon

Carbon atoms are the most versatile building blocks of the molecules used by living organisms because _____.

Each carbon atom can form up to four covalent bonds with a wide variety of bond angles

What is the process by which cells link monomers together to form polymers?

dehydration synthesis

In a hydrolysis reaction, _____. In this process, water is _____.

A polymer breaks up to form monomers ... consumed

Which of these is an amino group?

-NH2

choose the pair of terms that completes this sentence: Hydroxyl group is to ____ as ____ is to amino group.

alcohol ... amino

Ethanol, propanol, and methanol are three simple alcohols. They can be grouped together because they _____. (

all share the same functional group: a hydroxyl

. The four main categories of macromolecules in a cell are _____.

a. proteins, DNA, RNA, and steroids
b. monosaccharides, lipids, polysaccharides, and proteins
c. proteins, nucleic acids, carbohydrates, and lipids
d. nucleic acids, carbohydrates, monosaccharides, and proteins
e. RNA, DNA, proteins, and carbohydrates.

Which one of the following molecules is a carbohydrate?

C50H100O50

Sugars are mainly used by our bodies _____.

As fuel

One characteristic shared by sucrose and maltose is _____.

they are disaccharides

Cellulose is a _____ made of many _____.

polymer ... glucose molecules

Generally, animals cannot digest the linkages between the glucose molecules in cellulose. How then do cattle get enough nutrients from eating grass?

Microorganisms in their digestive tracts hydrolyze the cellulose to glucose.

In what polysaccharide form do plants store sugar to be available later for energy?

starch

The complex carbohydrate that you are most likely to have eaten recently is _____.

starch

A polysaccharide that we use for storing energy in our muscles and livers is _____.

glycogen

Which one of the following is not a function of carbohydrates (as a class)?

enzymatic activity

Which one of the following components of a tossed salad will pass through the human digestive tract with the least digestion?

cellulose (in the lettuce)

A glucose molecule is to starch as _____.

a nucleotide is to a nucleic acid

Lipids differ from other large biological molecules in that they _____.

are not truly polymers

Which is the correct term for compounds that do not mix with water?

hydrophobic

Nutritionally, saturated triglycerides are considered less healthful than unsaturated. What is one major difference between them?

Saturated triglycerides have more hydrogens than unsaturated triglycerides.

A fatty acid containing at least two double bonds is called _____. (

unsaturated

Manufacturers make vegetable oils solid or semisolid by _____. (

adding hydrogens

Hydrogenated vegetable oils are more like animal fats than are other plant oils. Because they _____ than other plant oils, they can contribute to cardiovascular disease.

contain fewer double bonds

cholesterol belongs to which class of molecules?

lipids

Some athletes use anabolic steroids to build their body mass. Why is this considered a problematic practice? )

All of the choices are correct.

Protein molecules are polymers of _____.

amino acid molecules

What do nucleic acids and proteins have in common?

They are large polymers.

Which of these is diagnostic of all amino acids?

-NH2

To what does the term "polypeptide" specifically refer?

none of the above

A peptide bond binds _____.

amino acids together in a protein

Which of the following would probably not be affected when a protein is denatured?

primary structure

Enzyme molecules require a specific shape to perform their catalytic function. Which of the following might alter the protein shape?

all of the above

The "primary structure" of a protein refers to _____.

the number and sequence of amino acids

38. The alpha helix and pleated sheet represent which level of protein structure?

secondary structure

The overall three-dimensional shape of a polypeptide is called the _____. (

tertiary structure

How does a protein's quaternary structure differ from other levels of protein structure?

It involves two or more polypeptide chains.

Based on the way nitrogen bases pair, you would expect the percentage of _____ to be equal to the percentage of _____.

a. A ... T

...

C6H1206

...

CC12F2

...

Sulfur

...

Nitrogen

...

Potassium

...

Oxygen

...

hydrolysis

...

monomerization

...

protein formation

...

coiling

...

a monomer breaks up to form polymers...produced

...

monomers are assembled to produce a polymer..consumed

...

Monomers are assembled to produce a polymer...produced

...

a polymer breaks up to form monomers...produced

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set