cell structure and function

Which structures are found in every living cell?

• a plasma membrane and cytoplasm

• chloroplasts and mitochondria

• a cell wall and nucleus

• central vacuole and chromosomes

An ameba, a one-celled organism, can move, ingest, and

transport materials within the cell, because it has

• organs

• tissues

• organelles

• systems

Which statement best describes the organelles in a cell?

• All organelles are involved directly with

  communication between cells.

• Organelles must work together and their activities

  must be coordinated.

• Organelles function only when there is a disruption

  in homeostasis.

• Each organelle must function independently of the

  others in order to maintain homeostasis.

In a multicellular organism, organs carry out a variety

of life functions. In a single-celled organism, these

functions are performed by

• tissues

• organ systems

• organelles

• organs

What has to be properly functioning in a unicellular

organism for homeostasis to be maintained?

• organelles

• guard cells

• insulin

• antibodies

Which organelle is correctly paired with its specific

function?

• cell membrane—storage of hereditary information

• chloroplast—transport of materials

• ribosome—synthesis of proteins

• vacuole—production of ATP

Hereditary information is stored inside the

• ribosomes, which have chromosomes that contain

  many genes

• ribosomes, which have genes that contain many

  chromosomes

• nucleus, which has chromosomes that contain

  many genes

• nucleus, which has genes that contain many

  chromosomes

Muscle cells in athletes often have more mitochondria

than muscle cells in nonathletes. Based on this

observation, it can be inferred that the muscle cells in

athletes

• have a smaller demand for cell proteins than the

  muscle cells of nonathletes

• nonathletes

• have nuclei containing more DNA than nuclei in

  the muscle cells of nonathletes

• have a greater demand for energy than the muscle

  cells of nonathletes

In a cell, information that controls the production of

proteins must pass from the nucleus to which organelle?

• cell membrane

• mitochondria

• chloroplasts

• ribosomes

Which cell organelle is most directly involved with the

bonding of amino acids?

• mitochondrion

• endoplasmic reticulum

• cell wall

• ribosome