Characteristics of Life
Cell Structures & Biomolecules
Cell Transport
Enzymes (Proteins)
Photosynthesis
100

Most organisms require that their internal environments remain in a fairly constant range, and so they maintain ______________.

Homeostasis

100

Which type of macromolecule has the function of storing and transmitting hereditary or genetic information?

nucleic acids

100
All cells are capable of cell transport because all cells have a ____________.

cell membrane

100

How do you know if a reaction is endothermic?

It absorbs energy

100

How can ADP be made into ATP?

adding energy to add a phosphate 
200

Living organisms use energy and materials to grow, develop, and reproduce. These life processes involve a set of chemical reactions called __________.

Metabolism

200

Eukaryotic cells contain a ______, but prokaryotic cells do not.

nucleus

200

The three types of passive transport (diffusion, facilitated diffusion, and osmosis) all move from _____ concentration to _____ concentration.

high / low

200

Enzymes speed up chemical reactions by lowering the _______________. 

activation energy

200

What are the inputs of photosynthesis?

water, sunlight, carbon dioxide

300

Biologists have certain criteria that must be met if something is to be considered living. All living things are made up of cells and have ______, which carries the genetic code. 

DNA

300

What structures are found only in plant cells and not animal cells?

chloroplasts, central vacuoles, and cell walls

300

Wes places red blood cells in a petri dish with pure water and observes them under a microscope. What will Wes observe?

water will move into the cells / they swell or burst / it was hypotonic 

300

The ______ of a protein dictates its function.

shape / structure / form

300

The pigment in chloroplasts responsible for photosynthesis is called ______.

chlorophyll

400

Valerie conducted a controlled experiment on pothos plants, which are common houseplants. Her hypothesis is that the direction of light will affect the growth pattern of a plant. In one test group, she allowed the plants to receive light from one direction only. Valerie observed that the plants in this group bent their stems and leaves toward the light.

Valerie’s observations most strongly demonstrate which characteristic of life?

respond to stimuli

400

What cell organelle is responsible for protein synthesis?

ribosomes

400

Alexis is using models of the cell membrane to compare the types of cellular transport. One model shows a molecule entering through a protein pump. Which type of cell transport is being modeled?

active transport

400

The location where the enzyme and the substrate (reactants) touch is called the ___________.

active site

400

Which is the role of the electron transport chain in the process of photosynthesis?

to carry electrons needed to make NADPH and ATP. 

500

According to the cell theory, what is the source of all new cells?

existing (old) cells

500

Why would muscles cells have more mitochondria than skin cells?

Muscle cells need more energy than skin cells.

500

The movement of matter across a cell membrane against a concentration difference is called __________, and it requires _________.

active transport / ATP (energy)

500

Since cyanide is a poison that limits a cell's ability to manufacture ATP, a cell containing cyanide is least likely to carry on the process of _________.

Active transport

500

When the light-independent reactions are occurring, gases diffuse between the chloroplast and the air that surrounds the plant. What gas diffusion is essential during this stage of photosynthesis?

carbon dioxide

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