Cell Transport
The movement of water across a membrane down its concentration gradient is known as ___.
a) diffusion
b) active transport
c) facilitated diffusion
d) osmosis
d) osmosis
Who was the first to identify, describe, and name cells by looking at a wine cork?
a) Leeuwenhoek
b) Hooke
c) Schleiden
d) Schwann
b) Hooke
Which of the following is true about prokaryotic cells?
a) They do not have a cell membrane
b) They do not have ribosomes
c) They do not have a nucleus
d) They do not have DNA
c) They do not have a nucleus
The cell membrane is primarily composed of ___.
a) carbohydrates
b) phospholipids
c) proteins
d) cholesterol
b) phospholipids
a) mitochondria
b) nucleus
c) chloroplast
d) cell wall
c) chloroplast
In what kind of solution would water move from the solution into the cell?
a) hypotonic
b) isotonic
c) hypertonic
d) hydrotonic
a) hypotonic
Which of the following best describes a scientific theory?
a) an observation of a phenomenon supported by evidence
b) an explanation of a phenomenon supported by evidence
c) an educated guess based on inferences
b) an explanation of a phenomenon supported by evidence
Which structure is only found in plant cells?
a) nucleus
b) vacuole
c) vesicle
d) cell wall
d) cell wall
The cell membrane is responsible for ____.
a) creating a barrier between the inside and outside of the cell
b) controlling the passage of materials in and out of the cell
c) maintaining the nutrient content of the cell
d) both A and B
d) both A and B
Which of these processes produces oxygen?
a) photosynthesis in plants
b) burning coal for heat
c) respiration in animals
d) operation of an acetylene torch
a) photosynthesis in plants
Facilitated diffusion ___.
a) is a type of active transport
b) uses energy to move molecules down the concentration gradient
c) uses proteins to move molecules down the concentration gradient
d) moves molecules against the concentration gradient
c) uses proteins to move molecules down the concentration gradient
Which of the following terms best matches this definition: Allows some materials to enter, but not all.
a) Selectively Permeable
b) Permeable
c) Impermeable
d) Diffusible
a) Selectively Permeable
Which of the following is NOT a function of the cytoskeleton?
a) supports and shapes the cell
b) provides strength
c) transports wastes outside the cell
d) aids in cell movement
c) transports wastes outside the cell
In a cell membrane, phospholipids arrange themselves in a ____.
a) bilayer
b) capsule
c) monolayer
d) channel protein
a) bilayer
Name the reactants of photosynthesis.
a) CO2 / H2O / ENERGY
b) O2 / H2O / ENERGY
c) C6H12O6 / O2
d) CO2 / C6H12O6 / ENERGY
a) CO2 / H2O / ENERGY
Which of the following is a type of active transport?
a) Osmosis
b) Facilitated diffusion
c) Exocytosis
d) Diffusion
c) Exocytosis
Which of the following is NOT part of the cell theory?
a) All cells are produced by other living cells.
b) The cell is the most basic unit of life.
c) All organisms are made of cells.
d) All cells have a nucleus and DNA.
d) All cells have a nucleus and DNA.
Which organelle contains enzymes that break down old cell parts?
a) centriole
b) vacuole
c) lysosome
d) mitochondria
c) lysosome
Which membrane component is responsible for cell communication and identification, such as recognizing "self" vs "non-self"?
a) Cholesterol
b) Carbohydrates
c) Phospholipids
d) Transport Proteins
b) Carbohydrates
The reactants of one are the products of the other, and vice versa.
_____ is the process of taking material into the cell by means of infoldings of the cell membrane.
A steady, balanced state of internal conditions within a cell is known as ___.
Homeostasis
Which of the following cell structures is often found in bacteria, and helps with locomotion (cell movement)?
a) cilia
b) vacuole
c) pili
d) flagellum
d) flagellum
Which membrane component is nonpolar and helps to provide strength and stability to the membrane?
Cholesterol
The two main processes by which plants absorb, release, and use energy are:
a) fermentation and respiration
b) aerobic and anaerobic respiration
c) photosynthesis and respiration
d) digestion and photosynthesis
c) photosynthesis and respiration