Homework # 7, Due 9/24/09

Homework Due 9/24/09

1- An organelle that releases energy for metabolic
activity in a nerve cell is the
(1) chloroplast (3) mitochondrion
(2) ribosome (4) vacuole

2- Scientists studying ocean organisms are discovering
new and unusual species. Which observation
could be used to determine that an ocean
organism carries out autotrophic nutrition?
(1) Chloroplasts are visible inside the cells.
(2) Digestive organs are visible upon dissection.
(3) The organism lives close to the surface.
(4) The organism synthesizes enzymes to digest
food.

3- Much of the carbon dioxide produced by green
plants is not excreted as a metabolic waste
because it
(1) can be used for photosynthesis
(2) is too large to pass through cell membranes
(3) is needed for cellular respiration
(4) can be used for the synthesis of proteins

4- An organelle that releases energy for metabolic
activity in a nerve cell is the
(1) chloroplast
(2) ribosome
(3) mitochondrion
(4) vacuole
6 A student notices that fruit flies with the curly-


5- Abiotic factors that characterize a forest eco-
system include
(1) light and biodiversity
(2) temperature and amount of available water
(3) types of producers and decomposers
(4) pH and number of heterotrophs

6- Researchers performing a well-designed experi-
ment should base their conclusions on
(1) the hypothesis of the experiment
(2) data from repeated trials of the experiment
(3) a small sample size to insure a reliable out-
come of the experiment
(4) results predicted before performing the
experiment

7- The largest amount of DNA in a plant cell is con-
tained in
(1) a nucleus
(2) a chromosome
(3) a protein molecule
(4) an enzyme molecule

8-The production of energy-rich ATP molecules is
the direct result of
(1) recycling light energy to be used in the
process of photosynthesis
(2) releasing the stored energy of organic com-
pounds by the process of respiration
(3) breaking down starch by the process of
digestion
(4) copying coded information during the
process of protein synthesis

9- What is it that plant cells make and animal cells cannot make? _______

10- List two raw materials that are needed by cell respiration.


11- In what organelles are enzymes manufactured? ________________________

12- Where do you find DNA inside the cell? ____________________________

13- ____________________________ controls what goes in and out of the cell.


14- _________________________ has digestive enzymes and break down things like viruses, bacteria, old organelles etc....