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Biology Exam

Biology Midterm Exam

QuestionAnswer
Who used a compound microscope to see chambers within cork and named them "cells"? Robert Hooke
Which of the following is NOT a principle of the cell theory? 1. cells are the basic units of life 2. all living things are made up of cells 3. very few cells are able to reproduce 4. all cells are produced from existing cells 3
Electron Microscopes can reveal details... 1. only in specimens that are still alive 2. about the different colors of cell structures 3. of cell structures only once they are stained 4. 1000x smaller than those visible in light microscopes 4
Colors seen in images made from electron microscopes are... 1. true to life 2. the colors of electrons 3. added to make certain structures easier to see 4. added so scientists can trace living cells through the body 3
Which of the following is a function of the nucleus? 1. stores DNA 2. stores sugars 3. builds proteins 4. packages proteins 1
Which best describes the relationship between the nucleus and the cytoplasm? 1. the cytoplasm fills the inside of the nucleus 2. the cytoplasm is an organelle usually found near the nucleus 3. the nucleus is an organelle surrounded by cytoplasm 3
Which organelle breaks down organelles that are no longer useful? Lysosome
Which structure make proteins using coded instructions that come from the nucleus? Ribosome
Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use? Mitochondria
Which organelle would you expect to find in plant cells but not animal cells? Chloroplast
The primary function of the cell wall is to... Support and protect the cell
You will NOT find a cell wall in which of these kinds of organisms? 1. plants 2. animals 3. fungi 4. bacteria 2
The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of? Proteins
Diffusion occurs because... 1. molecules are attracted to each other 2. molecules constantly movie & collide w/ each other 3. cellular energy forces molecules to collide w/ each other 4. cellular energy pumps molecules across the cell membrane 2
During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecule will... Continue to move across the membrane in both directions
The diffusion of water across a selectively permeable membrane is called... Osmosis
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes... Water to move into the cell
Which means of particle transport requires input of energy from the cell? Active transport
Which of the following activities is NOT a way that unicellular organisms maintain homeostasis? 1. reproduction 2. growth 3. cell specialization 4. response to the environment 3
Which term describes the relatively constant internal physical conditions of an organism? Homeostasis
The cells of unicellular organisms are... 1. specialized to perform different tasks 2. larger than those of multi-cellular organisms 3. able to carry out all of the functions necessary for life 4. unable to respond to changes
Created by: Tay13579
 

 



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