Lesson: Chapter - 4

Explanations

1. A

Total magnification is calculated by multiplying the power of the ocular and objective lenses. Since, in this case, the ocular lens has a magnification power of 10x and none of the possible objective lenses has a magnification power of 1x, it’s impossible for the microscope to have a total magnification power of 10x.

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3. C

The Golgi apparatus packages proteins for secretion by the cell. As for the other answer choices: the nucleus controls the cell’s activities, proteins are made in the cytoplasm and endoplasmic reticulum by ribosomes, and lipids are synthesized by the smooth endoplasmic reticulum.

Prokaryotes lack membrane-bound organelles but must have ribosomes for protein synthesis. Prokaryotes do not have a nucleus; DNA is stored in a coil in the

All of the answers are forms of transport, but only exocytosis is used to remove synthesized proteins from the cell. These proteins cannot undergo diffusion because they are too large to fit through the cell membrane. Osmosis refers only to the transport of water. Pinocytosis is a form of transport that involves taking liquids into the cell rather than secreting them. Passive transport includes diffusion and osmosis.

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