exam 2 actual

which of the following molecules is the pentose sugar found in RNA?

12

which of the following molecules could be called a disaccharide?

15 - the one with 2 hexagon shapes that look like they're holding hands

Which bond is closest to the amino terminus of the molecule?

A

cells require which of the following to form cytoskeleton?

A, B and C

tertiary structure of protein??

Defined by the hydrophilic and hydrophobic interactions between R groups of amino acid chains.

osmosis

Diffusion of water through a selectively permeable membrane

Diffusion

Movement of molecules from an area of higher concentration to an area of lower concentration.

all organisms are made up of cells who said this

Robert Hooke

which of the following statements correctly describes the normal tonicity conditions for typical plant and animal cells?

The animal cell is in an isotonic solution, and the plant cell is in a hypotonic solution.

secondary structure of protein??

The way in which the chain of amino acids of the polypeptides of a protein is folded.

the cell membranes of antarctic ice fish might have which of the following adaptations?

a high percentage of polyunsaturated fatty acids

which of the following descriptions best fits the class of molecules known as nucleotides?

a nitrogenous base, a phosphate group, and a pentose sugar

the chemical reaction illustrated in the figure below___

all options are correct

primary structure of protein??

amino acid sequence

the movement of potassium into an animal cell requires

an energy source such as ATP

You will not find a cell wall in

animals

you will not find a cell wall in

animals

steroids are considered to be lipids because they

are not soluble in water

to study organelles of eukaryotic cells, ___ is a useful technique

cell fragmentation

what does the term insoluble fiber refer to on food packages?

cellulose

which organelle or structure is absent in plant cells?

centrosomes

in what ways do the various membranes of a cell differ?

certain proteins are unique to each membrane

All of the following are part of a prokaryotic cell except

endoplasmic reticulum

protein

enzyme

.... which transport mechanism is most probably functioning in the intestinal cells?

facilitated diffusion

which transport mechanism is most probably functioning in the intestinal cells?

facilitated diffusion

a cell primarily producing proteins in the cytosol will do so with the help of

free ribosomes

Which of the following is NOT a polymer?

glucose

lipid

hydrophobic

carbohydrate

immediate and long term energy

in a plant cell, dna may be found ____

in the nucleus, mitochondria, and chloroplasts

molecule illustrated in the figure below

is a saturated fatty acid

Which of the classes of biological molecules does NOT include polymers?

lipids

Which organelle is the primary site of ATP synthesis in eukaryotic cells?

mitochondria

according to the endosymbiont theory, which of the following organelles have DNA

mitochondria and chloroplast

Which structure is common to plant and animal cells?

mitochondrian

which organelle is the primary site of ATP synthesis in eukaryotic cells?

mitochondrian

a molecules with the chemical formula c6h12o6 is probably a

monosaccharide

suppose a cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. it could be a cell from?

nearly any eukaryotic organism

nucleic acids are polymers made up of monomers and ____.

nucleotides

quarternary structure of protein

overall protein structure, combining 2 or more polypeptides

A glycosidic linkage in polysaccharides is analogous to which of the following in proteins?

peptide bond

which of the above is a functional group that you find in phospholipids and in nucleic acids

phosphate groups ?

which molecule has both hydrophilic and hydrophobic properties and is found in plasma membranes?

phospholipid (need pic) 4?

which of the following types of molecules are the major structural components of the cell membrane?

phospholipids and proteins

facilitated diffusion

process of diffusion in which molecules pass across the membrane through cell membrane channels

which of these classes of biological molecules have the most variety of functions?

proteins

which of the following help organisms move?

pseudopodia cilia flagella (but not flagella?)

which of the following is present in both a prokaryotic and a eukaryotic cell?

ribosome

dialysis

separation of molecules through a semipermeable membrane

What kinds of molecules pass through a cell membrane most easily?

small and hydrophobic

the liver is involved in detoxification of many poisons and drugs. which of the following structures is primarily involved in this process and, therefore, abundant in liver cells?

smooth er

what technique would be most appropriate to use to observe an amoeba eating a smaller protist?

standard light microscopy

nucleic acid

storing and processing of genetic information

which organelle often takes up much of the volume of a plant cell?

vacuole