Question

1. there are some similarities between prokaryotic and eukaryotic cells. which of the following structures is found in both prokaryotic and eukaryotic cells?

o a. lysosome
o b. mitochondria
o c. nucleus
o d. ribosome

1. a type of cellular transport is shown. which description best identifies this type of cellular transport?

a. osmosis, because energy is not being used to move molecules with the concentration gradient.
b. facilitated diffusion, because energy is being used to move molecules with their concentration gradient.
c. active transport, because energy is being used to move molecules against their concentration gradient.
d. endocytosis, because energy is not being used to move molecules against the concentration gradient.

Explanation:

Question 16

• Lysosome: Present only in eukaryotic cells (animal cells mainly) for digestion.
• Mitochondria: Present only in eukaryotic cells for energy production.
• Nucleus: Present only in eukaryotic cells as the genetic material - containing organelle.
• Ribosome: Present in both prokaryotic (70S) and eukaryotic (80S) cells for protein synthesis.

• Osmosis: Movement of water across a semi - permeable membrane, not shown here. Also, no ATP symbol in osmosis.
• Facilitated diffusion: Does not use energy (ATP). Moves with the concentration gradient. But the presence of ATP in the diagram rules this out.
• Active transport: Uses energy (ATP as shown in the diagram) and moves molecules against their concentration gradient (from lower to higher concentration as per the diagram).
• Endocytosis: Is a bulk transport mechanism (not shown here as it involves vesicle formation).

Answer:

d. Ribosome

Question 7