Pre-test for Unit 1

Which statement is most accurate to describe the cellular function Transport? It involves…

• Transformation of substances into simple forms

• Conversion of molecules to complex compounds

• Movement of materials across cell membranes

• Provision of support and growth

Answer explanation

A, B, and D are not the main description of transport in cells.

Cellular transport always requires the use of adenosine triphosphate as energy.

• True

• False

Answer explanation

Cellular transport does not always require the use of adenosine triphosphate as

energy. Example: Simple diffusion does not need energy.

There are factors that can affect the rate of cellular transport.

• True

• False

Answer explanation

Example of factors are: heat, presence of hormones, enzymes, water, etc.

The following are examples of substances that can be transported through facilitated diffusion, EXCEPT:

• Sugar and proteins

• Carbohydrates

• Vitamins

• Hormones and antibodies

Answer explanation

Hormone production is an example of exocytosis while antibodies may fall under

transcytosis.

Which requires ATP?

• Active transport

• Passive transport

• Diffusion

• Facilitated diffusion

Answer explanation

Function?

• Contains genetic material

• Produces ATP for cellular transport

• Involved in the transport of materials in and out of the cell

• Packages protein

Answer explanation

The nucleus contains the genetic composition of the cell. The plasma membrane is involved in cellular transport. the Golgi apparatus packages protein inside the cell while the mitochondria produce ATP for some cellular transport.

Function?

• Contains genetic material

• Produces ATP for cellular transport

• Involved in the transport of materials in and out of the cell

• Packages protein

Answer explanation

The nucleus contains the genetic composition of the cell. The plasma membrane is involved in cellular transport. the Golgi apparatus packages protein inside the cell while the mitochondria produce ATP for some cellular transport.

Function?

• Contains genetic material

• Produces ATP for cellular transport

• Involved in the transport of materials in and out of the cell

• Packages protein

Answer explanation

The nucleus contains the genetic composition of the cell. The plasma membrane is involved in cellular transport. the Golgi apparatus packages protein inside the cell while the mitochondria produce ATP for some cellular transport.

Function?

• Contains genetic material

• Produces ATP for cellular transport

• Involved in the transport of materials in and out of the cell

• Packages protein

Answer explanation

The nucleus contains the genetic composition of the cell. The plasma membrane is involved in cellular transport. the Golgi apparatus packages protein inside the cell while the mitochondria produce ATP for some cellular transport.

Which are FALSE about passive transport?

• It requires cellular energy

• It involves movement from high to low concentration

• May require use of protein carrier/s

Answer explanation

A is active transport. Osmosis is the movement of water from a solution with a high concentration of water molecules to a solution

with a lower concentration of water molecules passing thru a semipermeable membrane.