Chapter 3 True or false
All organisms are made of more than one cell
False
Animal cells have chloroplasts, organelles that capture light energy from the cell and use it to make food
False
Compared to eukaryotic cells, prokaryotic cells are very complex
False
DNA is located in the nucleus of prokaryotic cells
False
Early microscopes created by Leeuwenhoek were almost as strong as modern light microscopes
False
Endocytosis removes large molecules from the cell
False
Facilitated diffusion does not require any help from other substances
False
In diffusion, substances move from an area of lower concentration to an area of higher concentration
False
Ions can easily flow through a carrier protein
False
Passive transport needs energy
False
Prokaryotic cells have a nucleus
False
Roundworms have organ system level organization, in which groups of organs work together to do a specific job
False
The cytoplasm essentially acts as a "skeleton" inside the cell
False
The flagella on your lungs sweep foreign particles and mucus toward the mouth and nose
False
The plasma membrane is a single phospholipid layer that supports and protects a cell and controls what enters and leaves it
False
The sodium potassium pump is a type of channel protein
False
The water-hating hydrophobic tails of the phospholipid bilayer face the outside of the cell membrane
False
Viruses are similar to prokaryotic cells
False
Centrioles help organize chromosomes before cell division
True
Channel and carrier proteins are both transport proteins
True
Channel proteins form small "holes" in the plasma membrane
True
Diffusion does not require any help from other molecules
True
Diffusion is the osmosis of water
True
Endocytosis and exocytosis are types of vesicle transport
True
For cells, a smaller size is more efficient
True
In cell-level organization, different cells are specialized for different functions
True
Many of the biochemical reactions of the cell occur in the cytoplasm
True
Mitochondria contains its own DNA
True
Most cells are about the size of a period at the end of a sentence
True
Observation of cork helped in tge discovery of cells
True
Organelles allow eukaryotic cells to carry out more functions than prokaryotic cells
True
Organelles are located within the cytoplasm
True
Plant cells have special structures that are not found in animal cells, including a cell membrane, a large central vacuole, and plastids
True
Proteins are made on ribosomes
True
Ribosomes can be found attached to the endoplasmic recticulum
True
Small hydrophobic molecules can easily pass through the plasma membrane
True
The cytoskeleton is made from thread-like filaments and fibers
True
The plasma membrane controls what enters and leaves the cell
True
The plasma membrane forms the physical boundary between the cell and its environment
True
Transport of substances across the cell membrane helps maintain homeostasis by keeping the cell's conditions within normal ranges
True
Viruses are considered living organisms
True
ATP is made in the mitochondria
True
Active transport needs energy
True
All cells have a plasma membrane, cytoplasm, and ribosomes
True
Carrier proteins change shape when they transport substances
True
