CFA #2 Cells; RETAKES

This is a two part question. First, answer Part A. Then, answer Part B. Part A Which of the following are differences between eukaryotic cells and prokaryotic cells? Select TWO correct answers.

• Eukaryotic cells have cell membranes.

• Eukaryotic cells are much larger.

• Eukaryotic cells have nuclei.

• Eukaryotic cells have ribosomes.

• Eukaryotic cells can be seen under a microscope.

Part B In Part A, you were to select two differences between eukaryotic cells and prokaryotic cells. In Part B, what are two similarities between eukaryotic cells and prokaryotic cells? Select TWO correct answers.

• Both cells have mitochondria.

• Both cells have ribosomes.

• Both cells have nuclei.

• Both cells have cell membranes.

• Both cells are very complex.

Which of these are true of eukaryotic cells? Select TWO correct answers.

• Eukaryotic cells can be found within the Archaea domain.

• Eukaryotic cells all have a nucleus and other membrane-bound organelles.

• Eukaryotic cells can be found within the Bacteria domain.

• Eukaryotic cells do not have any membrane-bound organelles.

• Eukaryotic cells are more complex than prokaryotic cells.

Complete the statement below regarding types of passive transport. Drop the answers in the correct boxes.

Passive transport is represented in three different forms. ​ (a)   is the movement of water across a semipermeable membrane. ​ (b)   , like when someone sprays perfume, is the movement of molecules down or under a concentration gradient.​ (c)   is the movement of molecules down a gradient with the help of special protein channels.

• Active Transport
• Osmosis
• Diffusion
• Facilitated Diffusion

A cell is placed in a hypertonic solution. Predict what will happen next to the cell. Select TWO correct answers.

• Water neither enters nor leaves the cell.

• Water moves out of the cell.

• Water enters the cell.

• The cell expands in size.

• The cell shrinks in size.

A student put some drops of Lugol’s iodine solution into the water in the beaker shown to the right. The water turned red. After a short time, the starch solution inside the dialysis tubing turned black. Which function of the cell membrane was the student demonstrating?

• facilitated diffusion of starch

• active transport of hydrogen ions

• diffusion through a permeable membrane

• diffusion through a semipermeable membrane

The diagram to the right represents the process of active transport. In the table below, MATCH each term as it applies to active transport and match it up with its correct description.

• Concentration Gradient

• A. In active transport, this is what is moved across the cell membrane using transport proteins.

• Transport Proteins

• B. These span the cell membrane and provide a pathway for ions or molecules to move through.

• Ions or Molecules

• D. This is the source of energy that drives active transport.

• Transport Proteins

• C. The green dots represent the flow of molecules across the membrane from an area of low to high concentration.

Photosynthesis occurs by taking water from the soil, carbon dioxide from the air, and energy from the sun to form glucose (C₆H₁₂O₆) and oxygen gas. What is the balanced equation for photosynthesis as described in the previous statement?

• H₂O + CO₂ --> C₆H₁₂O₆ + O₂

• H₂O + CO₂ + energy --> C₆H₁₂O₆ + O₂

• 6 H₂O + 6 CO₂ --> C₆H₁₂O₆ + 6 O₂

• 6 H₂O + 6 CO₂ + energy --> C₆H₁₂O₆ + 6 O₂

In photosynthesis, water, carbon dioxide, and light energy react to produce glucose and oxygen. Based on the law of conservation of energy, what happened to the light energy in the reaction? Select TWO correct answers.

• It was converted into chemical energy stored in the sugar.

• It was neither created nor destroyed.

• It was destroyed.

• It was converted into carbonic acid.

• It was changed into carbon dioxide gas.

Identify substances which best complete the diagram at U and Y.

• U - H₂O and CO₂; Y - C₆H₁₂O₆ and O₂

• U - CO₂ and O₂; Y - C₆H₁₂O₆ and H₂O

• U - C₆H₁₂O₆ and O₂; Y - CO₂ and H₂O

• U - CH₂O and CO₂; Y - CO₂ and H₂O