Unit 2 Most Missed - Honors

Unit 2 Most Missed - Honors

Multiple Choice

What will happen if an animal cell that has a solute concentration of 5% is placed in a 1% saltwater solution?

• It will burst because there is more water on the outside of the cell than there is on the inside

• It will shrink because there is less water outside of the cell than there is on the inside

• It will burst because there is more water on the inside of the cell than there is on the outside

• It will remain the same size because there is an equal amount of water on the inside and outside of the cell

Explanation

We know that there is MORE SOLUTE inside the cell, so the water would rush in and burst the cell.

The answer is phrased backwards. If the outside of the cell has LOWER SOLUTE, then that means the outside will also have MORE WATER. It's another way to say LESS SOLUTE.

Multiple Choice

Amino acids, sugars, and ions move across the cell membrane. Their movement from a region of high concentration to a region of low concentration is accomplished by special proteins in the membrane. Which of the following terms applies to this type of cell transport?

• Transcription

• Active Transport

• Facilitated Diffusion

• Osmosis

Explanation

The only thing you need from the question is "high to low concentration" and "special proteins".

Facilitate means "to help" and diffusion is passive (doesn't need energy). Facilitated diffusion uses the help of proteins, but it is still passive.

Multiple Choice

A red blood cell will burst when placed in tap water. This illustrates:

• Water moving from a hypotonic solution into a cell

• Movement of water from a hypertonic solution to a cell

• Blood plasma expansion due to loss of salt content to hypotonic medium

• That tap water has more salt than in the blood cell

Explanation

A blood cell has MORE solutes than the tap water. That means the tap water has LOW solute. That makes the solution HYPOTONIC.

Water will rush into the cell, where there is the most solute.

Multiple Choice

What process best explains how a nerve cell and a muscle cell can both develop from the same fertilized egg?

• Genetic Engineering

• Differentiation

• Selective Breeding

• Natural Selection

Explanation

Differentiation means "to become different". This refers to a stem cell (totally plain) turning into more specialized cells (ex. skin, muscle, nerve, etc)

This is also the only definition we've talked about so far in the answer choices.

Multiple Choice

A student listed a few organelles which he thinks are common among both prokaryotic and eukaryotic cells.

Nucleus

Mitochondria

Ribosome

Plasma membrane

Which organelles did the student list correctly?

• Mitochondria and plasma membrane

• Nucleus and ribosome

• Ribosome and plasma membrane

• Nucleus and mitochondria

Explanation

Prokaryotes are simple, unicellular organisms with NO MEMBRANE BOUND ORGANELLES.

Eukaryotes are complex and have organelles.

The two that they have in common are the RIBOSOMES and CELL MEMBRANE. All cells have these.