Biology Final MC Questions

Which of the following is necessary for the formation of a generalized (typical) lipid?

alcohol

__ substances readily mix with water

hydrophilic

A surfactant:

facilitates the mixing of water and hydrophobic substances

The “typical” lipid is called a:

triglyceride

The difference between a fibrous protein with a pleated-sheet configuration and an enzyme is that an enzyme possesses:

teritiary structure

Which of the following is NOT a function of carbohydrates 

waterproofing

Which of the following does NOT contain nitrogen?

glycerol 

Water always behaves as if it is bounded by a membrane. This phenomenon is called:

surface tension

Which of the following is true of DNA but not of RNA?

configured as a double-helix

A substance that donates a hydrogen ion when in solution is a(n):

acid

Isotopes differ in their respective numbers of:

neutrons

The reaction A + B —> AB + H2O is called:

dehydration synthesis

The healthiest lipid of lipid componet in the diet is a(n):

omega-3 fatty acid

If an organic molecule is composed of O, H, C, and nothing else that molecule CANNOT be a(n):

amino acid

The monomeric unit of a nucleic acid is a(n):

nucleotide

Which substance would have a pH of 7?

solution of CaCl in water

A positively charged chemical particle is called a(n):

cation

A salt is a substrate that:

is ionically bound and neither donates nor accepts a hydrogen ion in a solution 

H-O-H the molecular structure drawn above represents a(n):

inorganic compound

A relatively high level of __ in the blood stream is indicative of a healthy lipid profile

HDL

The Endosymbiotic Hypothesis explains the existence of ___ in a eukaryotic cell

mitochondria and chloroplasts

Nucleic acid is a component of:

ribosomes

The rate of osmosis increases with:

Either heat or concentration gradient or both

Mitochondria contain:

cristae

The nucleolus is a collection of molecules of:

RNA

Patrick Star lives in Bikini Bottom, which is in osmotic equilibrium with his body. His environment is therefore:

isotonic

Placing Patrick in fresh water will causes his cells to:

gain water until they rupture

Placing Patrick in the Great Salt Lake of Utah will cause his cells to:

lose water

Movement of water across a membrane is called:

osmosis

The skeletal structure of a cell membrane is composed of 2 layers of

phospholipid

Schleiden and Schwann are given credit for the development of theL

Cell theory

__ are able to move freely across a cell membrane by simple diffusion

lipids

The difference between active transport and facilitated transport is the necessary input of:

energy

The cytoskeleton includes:

spindle fibers

The difference between vesicles and vacuoles is that vacuoles:

are bigger

Adjacent cells communicate in a multicellular plant via:

plasmodesmata

The net, high energy output of the Calvin Cycle is:

PGAL

Cyclic photophosphorylation differs from noncyclic photophosphorylation in the cyclic photophosphorylation does not:

split water and release O2

The Calvin Cycle represents the light-independent reactions of:

C-3 plants

The complete respiration of a molecule of glucose includes all of the following except:

noncyclic photophosphorylation

Which of the following processes is anaerobic?

glycolysis

The high-energy outputs of noncyclic photophosphorylation include ATP and:

NADPH2

Which of the following best describes the process by which NADP becomes NADPH2 in photosynthesis?

reduction

Electron transport that results in phosphorylation is carried out by:

cytochromes

To avoid photorespiration, C-4 plants utilize the biochemical pathway __ as the light-independent reactions of photosynthesis

Hatch-Slack pathway

The molecule known as the “energy currency of the cell” is:

adenosine triphosphate

The molecules that represents one-half of a glucose molecule is:

PGAL

Which molecule has the least available energy for a cell?

CO2

Energy can neither be created nor destroyed. This is a statement of the:

First Law of Thermodynamics 

No energy conversion is 100% efficient. This is a statement of the:

Second Law of Thermodynamics

Which of the following represents the most reduced compound?

CH4 (methane)

The molecule known as P700 represents:

a primary pigment in photosynthesis

Xanthophylls and carotenoids are examples of:

accessory pigments in photosynthesis

Thylakoids are part of the:

chloroplast

This drawing depicts the cellular organelle:

mitochondrion

The Calvin Cycle takes place in the __ of the chloroplast:

stroma