EnzymeRespPhoto

Which substances are inorganic compounds?

• water and salts

• proteins and carbohydrates

• fats and oils

• enzymes and hormones

An iodine test of a tomato plant leaf revealed that starch was present at 5:00 p.m. on a sunny afternoon in July. When a similar leaf from the same tomato plant was tested with iodine at 6:00 a.m. the next morning, the test indicated that less starch was present in this leaf than in the leaf tested the day before. This reduction in starch content occurred because starch was

• changed into cellulose

• transported out of the leaves through the stomates

• conducted downward toward the roots through vessels

• digested into simple sugars

Base your answer on the chemical equation shown in the diagram and your knowledge of biology. The reaction indicated by arrow E illustrates

• hydrolysis

  (breaking with water)

• dehydration synthesis

  (putting something together to make a bigger molecule by removing water)

• photolysis

• aerobic respiration

Answer explanation

Lysis = to break; when we think of breaking things up we generally create smaller or simpler molecules

we also see it when cells burst -rbc in hypotonic solution when water rushes into the rbc because the rbc has more solute in it than outside it

hydro-lysis means breaking with the use of water

photolysis means breaking with the use of light/photons

DEhydration synthesis is a common mechanism of molecular synthesis (building/making) molecules. Here, we remove water to join other molecules.

A sample of food containing one type of a large molecule was treated with a specific digestive enzyme. Nutrient tests performed on the resulting products showed the presence of simple sugars, only. Based on these test results, the original large molecules contained in the sample were molecules of

• protein

• glucose

• starch

• DNA

Answer explanation

Starch is a big bulky complex carb full of baby sugars or basic sugar building blocks

After photosynthesis, plants can EITHER send glucose off into cellular respiration, ultimately in the mitochondria (starts in cytoplasm) OR plants can store excess sugar as starch

Which activity occurs in the process of photosynthesis?

• Chemical energy from organic molecules is converted into light energy.

• Organic molecules are obtained from the environment.

• Organic molecules are converted into inorganic food molecules.

• Light energy is converted into the chemical energy of organic molecules.

The dense needles of Douglas fir trees can prevent most light from reaching the forest floor. This situation would have the most immediate effect on

• producers

• carnivores

• herbivores

• decomposers

Answer explanation

While you may have been tempted by "herbivores" as an answer, remember, autotrophs (producers) PRODUCE THEIR OWN FOOD; they are living organisms and they need to obtain nutrients for life processes just like us. Producers just have the ability to produce their own food!

The diagram represents part of a life process in a leaf chloroplast. If the process illustrated in the diagram is interrupted by a chemical at point X, there would be an immediate effect on the release of

• chlorophyll

• nitrogen

• carbon dioxide

• oxygen

Answer explanation

Photosynthesis releases oxygen (O2).

What are the products (what is released) of cellular respiration? (Mark all of them!)

• oxygen

• glucose

• carbon dioxide

• water

• ATP (energy)

Cellular respiration and photosynthesis are considered to be....

• the same equation

• opposites of one another

• unique in every way

• not important at all!

What is the equation for photosynthesis?

• O2+ H2O → C6H12O6 + CO2

• CO2+ Light → C6H12O6 + O2

• CO2+ H2O+ light → C6H12O6 + O2

• O2 + H2O + light

  -> C6H12O6 + CO2