Cell structure and function Practice Quiz

CJ is studying the cells of an organism under a microscope. He notices that the cells have a nucleus. He should classify this organism as a _______.

• Prokaryotes

• Eukaryotes

• Bacteria

• Archaea

Answer explanation

CJ should classify the organism as Eukaryotes because the presence of a nucleus indicates it has a complex cell structure, which is characteristic of eukaryotic cells, unlike prokaryotes, bacteria, and archaea.

Emma is studying biology and she is curious to know, what is the basic unit of an organism that Sam mentioned in their discussion?

• Chloroplast

• Organ

• Organelle

• Cell

Answer explanation

The basic unit of an organism is the cell. Cells are the smallest structural and functional units of life, making them fundamental to all living organisms.

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Obryoni and Ayanna are working on a science project about organisms. They are studying a type of organism that is composed of many cells, each with a special function. What type of organism are they studying?

• Multicellular

• Prokaryotic

• Eukaryotic

• Unicellular

Answer explanation

Obryoni and Ayanna are studying a multicellular organism, which is made up of many cells, each with a specific function. This distinguishes them from unicellular organisms, which consist of only one cell.

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Tamarr and Josselyn are working on a science project about cells. They are discussing the small structures inside cells that carry out specific functions. What are these structures called?

• Organelles

• Tissues

• Organs

Answer explanation

The small structures inside cells that perform specific functions are called organelles. Tissues are groups of cells, and organs are made up of tissues, making organelles the correct choice.

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Bri is studying different types of organisms. She comes across a bacteria. This bacteria is an example of a...

• Animal

• Plant

• Virus

• Prokaryote

Answer explanation

Bacteria are single-celled organisms that lack a nucleus, classifying them as prokaryotes. Unlike animals and plants, they do not have complex cellular structures, and they are not viruses, which are acellular.

Michael and Samantha are studying biology. They come across a cell under the microscope. They notice that the cell has a nucleus. What type of cell is it likely to be?

• Eukaryote

• Prokaryote

• Both

Answer explanation

The presence of a nucleus indicates that the cell is a eukaryote. Prokaryotic cells, such as bacteria, do not have a nucleus. Therefore, Michael and Samantha are observing a eukaryotic cell.

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Lawrence found a cell under his microscope in the biology lab. He is not sure whether it is a Prokaryote or Eukaryote. Ja'Mine, being a biology enthusiast, can you help him identify what type of cell it is?

• Prokaryote

• Eukaryote

• Both

Answer explanation

Eukaryotic cells have a defined nucleus and membrane-bound organelles, unlike prokaryotes. If Lawrence observed these features under the microscope, the cell is identified as a Eukaryote.

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CJ and Dakota are studying cells in their biology class. They come across a cell without a nucleus. What type of cell is it likely to be?

• Prokaryote

• Both

• Neither

• Eukaryote

Answer explanation

A cell without a nucleus is likely a prokaryote, as prokaryotic cells, like bacteria, do not have a defined nucleus. In contrast, eukaryotic cells, such as plant and animal cells, do contain a nucleus.

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Lawrence and Ayanna are studying about Prokaryotic cells. They learned that DNA is not found in a specific place like it is in Eukaryotic cells. Can you tell them where is DNA found in a Prokaryotic cell?

• Inside the Nucleus

• Inside the cell (No specific place)

Answer explanation

In Prokaryotic cells, DNA is not contained within a nucleus like in Eukaryotic cells. Instead, it is found inside the cell but not in a specific location, making 'Inside the cell (No specific place)' the correct answer.

Kylan is studying the structure of a eukaryotic cell for his biology project. He is particularly interested in where DNA is stored. Can you help him identify the correct location?

• Cytoplasm

• Mitochondria

• Ribosomes

• Nucleus

Answer explanation

In eukaryotic cells, DNA is primarily stored in the nucleus, which serves as the control center for the cell. The cytoplasm, mitochondria, and ribosomes do not store DNA.

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