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Flashcards in Quiz 1 Deck (24)
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1
Q

Due to the lack of an enzyme to break down lipids, excess accumulation of lipids in the brain leads to a human disease called Tay Sachs. Which organelle is likely to be the one that lacks the proper enzyme needed for lipid breakdown?

A

lysosome

2
Q

Which organelle stores water, ions, and functions in cell elongation during growth of a plant cell?

A

Vacuole

3
Q

The outer membrane of the nuclear envelope often has bound ribosomes. What can you conclude from this?

A

at least some of the proteins that function in the nuclear envelope are made by the ribosomes on the nuclear envelope.

4
Q

Which contains oxidase enzymes and is involved in detoxification reactions?

A

peroxisome

5
Q

Thylakoids, stoma, and ribosomes are all components found in

A

chloroplasts

6
Q

The nucleus is to eukaryotes as the ________ is to prokaryotes.

A

nucleoid

7
Q

Which of the following is true for all exergonic reactions?

A

The reaction proceeds with a net release of free energy.

8
Q

How can one increase the rate of a chemical reaction?

A

Add a catalyst.

9
Q

When one hydrogen atom shares a pair of electrons with another hydrogen atom, H2 is formed via a(n)

A

single covalent bond

10
Q

The nucleus of an atom is composed of

A

protons and neutrons

11
Q

Carbon and hydrogen have similar electronegativities and combine together to form hydrocarbon molecules. What type of bonds form between these atoms?

A

nonpolar covalent

12
Q

Amphipathic molecules

A

possess both hydrophilic and hydrophobic properties.

13
Q

A grave consequence of uncontrolled fever can be:

A

change in the tertiary structure of your enzymes

14
Q

Enzymes are biological catalysts that enhance the rate of a reaction by:

A

decreasing the activation energy.

15
Q

The active site of an enzyme is the region that

A

is involved in the catalytic reaction of the enzyme

16
Q

The tertiary structure of a protein is dependent on

A

the side chain composition of each amino acid within the protein.

17
Q

Which factor is responsible for inhibiting a metabolic process by feedback?

A

end product

18
Q

A noncompetitive inhibitor decreases the rate of an enzyme reaction by:

A

changing the shape of the enzyme’s active site

19
Q

By increasing the substrate concentration in an enzymatic reaction, one could overcome which of the following?

A

competitive inhibition

20
Q

The __________ is a measure of the affinity of an enzyme for its substrate and is the substrate concentration that yields half-maximal reaction rate.

A

Km

21
Q

The ________________ bonds between the side chains of cysteine residues in some proteins covalently link regions of proteins, thus restricting the proteins’ flexibility and increasing the stability of their tertiary structures.

A

Disulfide

22
Q

________________ bond is the covalent linkage established between 2 monosaccharide residues when they come together to form a disaccharide.

A

Glycosidic

23
Q

Total genetic information carried by a cell or an organism is known as _________.

A

Genome

24
Q

Proteins that have a common ancestor are referred to as ________________.

A

Homologs