Unit 3 : The Cell Multiple Choice Flashcards
Resolution of a microscope refers to
The sharpness or clarity of an image
The detailed structure of a chloroplast can be seen with the best resolution by using
Transmission electron microscopy
In an animal cell fractionation procedure, one of the last pellets from the series of centrifugations would most likely contain
Ribosomes
Which of the following is/are not found in a prokaryotic cell?
Ribosomes Plasma membrane Mitochondria A and C A, b, and c
C
The cells of an ant and an elephant are, on average, the same size; an elephant just has more cells. What is the main advantage of small cell size?
A small cell has a larger surface area relative to cytoplasmic volume, facilitating sufficient exchange of materials
Proteins that function within the cytoskeleton are generally synthesized
By free ribosomes
The pores in the nuclear envelope provide for the movement of
A. Proteins in the nucleus B. Ribosomal subunits out of the nucleus C. mRNA out of the nucleus D. Signal molecules into the nucleus E. all of the above
All of the above
A growing plant cell elongates primarily by
Producing a secondary cell wall
What is not a similarity among nuclei, chloroplasts, and mitochondria?
They are derived from the ER
The contractile elements of muscle cells are
Microfilaments (actin filaments)
Microtubules are not components of
The cleavage furrow that pinches apart cells in animal cell division
What characteristics are shared by cristae of mitochondria, thylakoids, and microvilli?
Have a large surface area of membrane that enhances their particular function
The innermost portion of the cell wall of a plant cell specialized for support is the
Secondary cell wall
Plasmodesmata in plant cells are similar in function to
Gap junctions
Which of the following structures is/ are involved in receiving external information and relaying it into a cell? A. Primary cilium B. Fibronectins C. Integrins D. Microfilaments of the cytoskeleton E. all of the above
Integrins
