Biology Of The Cell - prac test 1

Which of the following can ONLY be viewed by electron microscopy? 1.bacteria 2.viruses 3.mitochondria 4.frog eggs 5.nuclei

2.Viruses

Robert Hooke was most influential in which field of biology?

Microscopy

Which two organelle apart from the nucleus also contain DNA?

Mitochondria and Chloroplasts

The major structural elements of the cytoskeleton are

microtubules, microfilaments, and intermediate filaments

A protein is destined to be secreted from a cell. In which organelle would you expect to find the protein just after it is produced in the Rough Endoplasmic Reticulum?

Golgi Apparatus

The smooth endoplasmic reticulum functions in synthesis of

Lipids

When the size of a cell increases, the surface area/volume ratio _______.

decreases

The size range of most plant and animal cells is ________

10-50 μm

1 mm = ________ nm

1,000,000

The outcome of the joining of cytology and biochemistry yielded a better understanding of the cell by 1.identification of cellular biochemical pathways. 2.identification of cellular structures. 3.demonstration of bioinformatics. 4.both A and B. 5.both B and C.

4.both A and B

The endosymbiotic theory suggests mitochondria originated outside of prokaryotic cells. Evidence that supports this is 1.Mitochondria divide in a similar way to bacteria 2.Mitochondria have their own DNA 3.Mitochondria possess ribosomes 4.Mitochondria can live without being inside a prokaryotic cell 5.answers 1,2 and 3 are all correct

5. answers 1,2 and 3 are all correct

Which of the following organelles is NOT generally found in animal cells? 1.endoplasmic reticulum 2.mitochondrion 3.centriole 4.food vacuole 5.central vacuole

5. central vacuole

Cytoskeleton

A complex network of interconnected filaments and tubules that extends throughout the cytosol, from the nucleus to the inner surface of the plasma membrane

Which of the following is smallest? 1.a protein 2.a bacterium 3.a virus 4.a ribosome 5.a mitochondrion

A protein

A scientist is examining protozoa moving on a slide. He wishes to determine their direction of movement. Which microscopic techniques is least likely to be used to view these cells?

Electron Microscopy

Which type of microscopy has the greatest resolving power?

Electron Microscopy

Which of the following is true of plant cells? 1.Only plant cells have a cell membrane. 2.Plant cells are always much larger than animal cells. 3.The plant cell has no cell wall. 4.Plant cells may contain chloroplasts. 5.Chromosomes are found only in plant cells

Plant cells may contain chloroplasts

A nanometre is __________ of a metre.

one billionth

Cytosol

semifluid substance in which organelles are suspended