Ch 5 Photosynthesis

During photosynthesis ​ (a)   is converted into ​ (b)   THEN the chemical energy is converted into ​ (c)   .

• light energy
• chemical energy
• ATP energy
• glucose

Answer explanation

Photosynthesis is a process in which light energy is turned into chemical energy, then the chemical energy is used to make glucose

What are the reactants of photsynthesis?

• glucose

• carbon dioxide

• water

• oxygen

• light energy

Answer explanation

Light energy, carbon dioxide, and water are all needed in order for the chloroplast to perform photosynthesis.

What are the products of photosynthesis?

• glucose

• light energy

• oxygen

• water

• carbon dioxide

Answer explanation

Glucose and oxygen are both produced during photosynthesis. Glucose is the plant's food. Oxygen is a waste product that gets released by the plant (or other photosynthetic organisms).

Which organism(s) are not photosynthetic?

• plants

• animals

• algae

• photosynthetic bacteria

Answer explanation

Animal cells do not contain chloroplasts, so animals can not perform photosynthesis.

What is the initial energy source for most life on Earth?

• light energy from Sun

• gravity waves

• water

• oxygen

Answer explanation

Light energy from the sun causes photosynthetic organisms to make glucose and oxygen. Then many other organisms benefit from the products of the photosynthetic organisms.

C₆H₁₂O₆ is the chemical formula for this important molecule made during photosynthesis

• proteins

• glucose

• oxygen

• lipids

Light absorbing molecules that capture energy from sunlight are called

• chlorophyll

• chloroplasts

• pigments

• solar absorbers

Answer explanation

Light absorbing molecules are called pigments. Chlorophyll is the green pigment found inside chloroplasts. I like to say "chlorophyll fills up the chloroplast" to help remember that chlorophyll is the green pigment INSIDE chloroplasts.

Which 3 color wavelengths of light does chlorophyll absorb and use during photosynthesis?

• violet

• red

• green

• blue

• orange

Answer explanation

Chlorophyll absorbs blue-violet and red wavelengths of the visible light spectrum to perform photosynthesis. It reflects almost all of the green wavelength of light.

Chloroplasts can move around in a cell in order to absorb as much light as possible

• true

• false

Answer explanation

This is pretty amazing! YES, chloroplasts actually move around within a cell in order to absorb as much light as possible in order to perform photosynthesis.

The inner part of the chloroplast that look like green flattened discs, this is where light E is converted into chemical E

• thylakoid

• stroma

• granum

• inner + outer membrane

Answer explanation

The inner part of the chloroplast that look like green flattened discs are called the thylakoids. A stack of thylakoids is called a granum.