1) Enzymes have an optimum temperature at which they work best. Temperatures above
and below this optimum will decrease enzyme activity. Which graph best illustrates
the effect of temperature on enzyme activity?
2- 4Base your answers to questions 37 through 39 on the two different cells shown below.
Only cell A produces substance X. Both cells A and B use substance X.
2) Identify substance X. [1] ______
3) Identify the type of organelle in cell A that produces substance X. ______
4) Identify the type of organelle found in both cell A and cell B that uses substance X.
5-6 Carbon exists in a simple organic molecule in a leaf and in an inorganic molecule in the air humans exhale.
5) Identify the simple organic molecule formed in the leaf and the process that produces it. [2]
______
6) Identify the carbon-containing molecule that humans exhale and the process that produces it. [2]
7) Organisms that have the ability to use an atmospheric gas to produce an organic nutrient are known as
(1) herbivores (2) decomposers (3) carnivores (4) autotrophs
8) What substance could be represented by the letter X in the diagram below?/ 10) Which letter indicates a cell structure that directly controls the movement of molecules into and out of the cell?
9) Th e diagram below represents a cross section of a leaf. Explain how the structures labeled X function to maintain homeostasis in a plant
/ 11) Living organisms must be able to obtain materials, change the materials into new forms, remove
poisons, and move needed material from one place to another. Many of these activities directly
require (1) energy released from ATP (2) carbohydrates formed from receptor molecules
(3) the synthesis of DNA (4) the breakdown of energy-rich inorganic molecu les
12) Which process is directly used by autotrophs to store energy in glucose?
(1) diffusion (3) respiration (2) photosynthesis (4) active transport
13) Explain the phrase “only certain organisms can change solar energy into chemical energy,” in the underlined portion of the first paragraph. In your answer be sure to identify:
• the type of nutrition carried out by these organisms [1]
• the process being carried out in this type of nutrition [1]
• the organelles present in the cells of these organisms that are directly involved in
changing solar energy into chemical energy [1]
14) The equation below represents a summary of a biological process.
This process is completed in (1) mitochondria (3) cell membranes (2) ribosomes (4) chloroplasts
15) In heterotrophs, energy for the life processes comes from the chemical energy stored in the
bonds of (1) water molecules (2) oxygen molecules (3) organic compounds (4) inorganic compounds
16) An enzyme and four different molecules are shown in the diagram below. The enzyme would most likely affect reactions involving molecule ______. Why?
17) Describe/label/and or explain the three diagrams below
18) Elodea is a plant that lives in freshwater. The diagram below represents one Elodea leaf
cell in its normal freshwater environment.
Predict how the contents of the Elodea cell would change if the cell was placed in saltwater for several minutes by completing the diagram, “Elodea cell in saltwater” above. WHY DOES IT HAPPEN? !!! Label the location of the cell membrane.
19)If vegetables become wilted, they can often be made crisp again by soaking them in water. However, they may lose a few nutrients during this process. Using the concept of diffusion and concentration, state why some nutrients would leave the plant cell.
YOU MUST BE ABLE TO LABEL A PLANT OR ANIMAL CELL!!!