A scientist is reviewing the following features about a cell under a microscope.Cell Features1Has ribosomes2Has DNA enclosed in a nucleus3Has a cell wall

Is this cell a eukaryote or a prokaryote?

Prokaryotes are single-celled organisms belonging to the Domains: Archae and Bacteria. Which of the following cell structures would not be present in prokaryotic cells?

Which structures, if found in a cell, would provide the best evidence that the cell is eukaryotic?

Scientists think eukaryotes may have evolved from an endosymbiotic relationship between prokaryotes of mitochondria and host parasitic cells. One piece of evidence that supports this endosymbiosis theory is that mitochondria have their own system of transcription and translation that more closely resembles protein synthesis in prokaryotes than eukaryotes.

Upon evaluation of this information, which of the following statements is most likely true?

Which structure can be found in both eukaryotic and prokaryotic cells?

A single-celled organism can be classified as a prokaryote based on the absence of —

Diffusion and osmosis are both vital to cell function. Diffusion and osmosis are similar in that they are both types of –

The energy that comes from organic compounds is transferred to the cell to maintain healthy function. Which organelle in an animal cell is responsible for this energy transfer?

Energy conversion within a plant cell would be limited most severely by removal of the cell's –

Which of the following cell processes would stop first if all the lysosomes in a cell were suddenly destroyed?

A student put some drops of Lugol’s iodine solution into the water in the beaker shown above. 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?

Turgor pressure is the pressure exerted on a plant cell wall by water. When wilted plants are placed in water, they demonstrate increased turgor pressure and become straighter.

What is occurring at the cellular level when plants display increased turgor pressure?

Students are discussing what they know about cellular transport. Their explanations are displayed in the table.

Which student(s) gave an accurate statement regarding cellular transport?

How does the cell membrane help maintain homeostasis for the cell?

Due to environmental changes, the water concentration outside of a cell becomes lower than the water concentration inside of the cell. How would the cell most likely respond to maintain homeostasis?

The disorder that may occur when the cell cycle is disrupted and can result in the uncontrollable division of cells within the body is called –

Which of the following may result in cancer?

I. Poor diet

II. Chemicals in cigarettes

III. Ultraviolet light

IV. Tobacco use

As cancerous cells multiply uncontrollably, abnormal tissue masses form. These masses of tissue are called –

Cellular senescence is a phenomenon that occurs naturally to older cells causing them to stop dividing. Recently, scientists have identified specific proteins that can cause cellular senescence to occur in any cells, not just older cells.

If the newly identified proteins could be used in controlled medical applications, what is the most likely benefit?

Oncogenes are mutated forms of genes. Oncogenes can transform a cell into a tumor cell. Some tumor cells are benign, while others are malignant. How does the presence of an oncogene lead to the formation of a tumor?

Which statement best summarizes the purpose of the process of DNA replication?

Refer to the diagram above. During which phase does DNA replication occur?

Refer to the diagram above. The cell cycle has checkpoints built in to ensure that each cell has met certain criteria before being allowed to move to the next stage.

Which statement below correctly identifies what happens prior to the cell being allowed to enter the G₂ stage of the cell cycle?

What is the purpose of mitosis?

Refer to the diagram. Arrange the stages in order.

Cells pass through a checkpoint before entering mitosis. Ideally, if DNA damage is 2 detected, the cells do not enter mitosis until the damage is repaired. Why is DNA damage repaired before cells enter mitosis?

Scientists can bioengineer skin in a laboratory to treat severe burns and other types of skin injuries. This bioengineered tissue is grown from living cells. The cellular process that enables the cells to grow and develop into tissue is —

The model represents the change in the DNA content of a cell during the cell cycle.

Which part of the model represents the S phase?

A photomicrograph of onion root tip cells during mitosis is shown below.

Which phase of mitosis is occurring in the cell indicated by the arrow?