3.13 Mid-Unit Test: Cell Biology

Which term names the process whereby molecules in vesicles are exported out of the cell? osmosis exocytosis diffusion endocytosis

exocytosis

Which structure would not be found in a prokaryotic cell? DNA cytoplasm membrane-bound organelles cell membrane

membrane-bound organelles

In multicellular organisms, which term tells the highest level of cellular organization? cells tissues organs systems

systems

In a eukaryotic cell, where is most of the DNA located? cell wall cytoplasm Golgi body nucleus

nucleus

Which statement is part of the cell theory? All cells are produced from other cells. All cells are the same. Cells are able to make new organisms. Cells are independent structures.

All cells are produced from other cells.

Which statement is true of both active transport and facilitated diffusion? Both involve proteins in the cell membrane. Both move materials down a concentration gradient. Both occur in only one direction. Both require ATP .

Both involve proteins in the cell membrane.

Semipermeable cell membranes are made of phospholipids that form a bilayer. What major benefit does this arrangement of the membrane provide to the cell? The cell has a greater level of structural support. The cell is able to easily change size and shape. Both surfaces of the membrane can interact with water and other molecules. Both surfaces of the membrane are nonpermeable.

Both surfaces of the membrane can interact with water and other molecules.

Despite its name, the Pacific sea horse is actually a type of fish. Its horse-shaped head gives it its name. This creature lives in the Pacific waters off the west coast of the Americas, from Peru to Southern California. Like many other ocean fish, sea horses face the constant challenge of losing water to their saltier environment. When a sea horse sees a predator, its nervous system kicks into high gear. Which structure is responsible for transmitting signals from one nerve cell to the next? Golgi body cell membrane ribosome nucleus

cell membrane

Where does most of the metabolic activity in the cell occur? nucleus DNA cell wall cytoplasm

cytoplasm

The inner membrane of mitochondria consists of many folds. What is the purpose of this membrane? provide structural support for the mitochondria decrease the surface area so substances can't diffuse in house enzymes needed for digestion increase the surface area to allow more space for ATP synthesis

increase the surface area to allow more space for ATP synthesis

Despite its name, the Pacific sea horse is actually a type of fish. Its horse-shaped head gives it its name. This creature lives in the Pacific waters off the west coast of the Americas, from Peru to Southern California. Like many other ocean fish, sea horses face the constant challenge of losing water to their saltier environment. When the sea horse eats a meal, its body breaks down organic molecules in the food. Some of those molecules enter cellular respiration, which ultimately produces the molecule ATP. In which part of the sea horse's cells is ATP produced? Golgi bodies lysosomes vacuoles mitochondria

mitochondria

Which phrase best defines diffusion? active transport of particles up a concentration gradient movement of particles from a region of low concentration to a region of high concentration movement through a cell membrane using energy from ATP movement of particles from a region of high concentration to a region of low concentration

movement of particles from a region of high concentration to a region of low concentration

Which process does osmosis involve? movement of solute across the cell membrane movement of water across a cell membrane movement of solute up a concentration gradient movement of water up a concentration gradient

movement of water across a cell membrane

Despite its name, the Pacific sea horse is actually a type of fish. Its horse-shaped head gives it its name. This creature lives in the Pacific waters off the west coast of the Americas, from Peru to Southern California. Like many other ocean fish, sea horses face the constant challenge of losing water to their saltier environment. When a Pacific sea horse's body loses water to its environment, which process is responsible? endocytosis osmosis exocytosis active transport

osmosis

Which statement is true of eukaryotes but not of prokaryotes? They must contain a nucleus. They do not have membrane-bound organelles. They must be multicellular. They are always single-celled.

they must contain a nucleus