Gr 9 Natural Sciences Ch 1: Cell structure

What is the primary function of mitochondria?

Storage of nutrients and waste

Photosynthesis

Cellular respiration (correct)

Protein synthesis

What shape do red blood cells have to assist their function?

Cuboidal

Biconcave (correct)

Spherical

Columnar

What is the main role of vacuoles in plant cells?

Regulating cell division

Storage and maintaining turgor pressure (correct)

Energy production

Gene expression

Which of the following best describes the cytoplasm?

Contents within the cell membrane, excluding the nucleus Signup and view all the answers

What defines selective permeability in a cell membrane?

The property that allows some substances to pass while blocking others Signup and view all the answers

What does DNA stand for?

Deoxyribonucleic Acid Signup and view all the answers

What is cytology?

The scientific study of cells Signup and view all the answers

What is a key function of protoplasm in a cell?

Comprising the living content of a cell Signup and view all the answers

What is the primary function of the cell membrane?

To regulate the movement of substances in and out of the cell Signup and view all the answers

Which of the following is a characteristic feature of eukaryotic cells?

Presence of a nuclear membrane Signup and view all the answers

Which component of the cell is responsible for containing organelles?

Cytoplasm Signup and view all the answers

What type of cells are bacteria categorized as?

Prokaryotic cells Signup and view all the answers

What is the role of the nucleolus within the nucleus?

To synthesize ribosomal RNA Signup and view all the answers

Which structure in eukaryotic cells contains the genetic material?

Nucleus Signup and view all the answers

How do cells specialize in function and structure?

Through differentiation based on stimuli Signup and view all the answers

Which of the following organelles is found in the cytoplasm of a eukaryotic cell?

Ribosomes Signup and view all the answers

What is the primary reason for the biconcave shape of red blood cells?

To increase surface area for oxygen transport Signup and view all the answers

What is one of the structural features of mitochondria?

Folding of the inner membrane into cristae Signup and view all the answers

How does a vacuole contribute to cell function in plants?

By storing nutrients and maintaining turgor pressure Signup and view all the answers

What encompasses the living content of a cell?

Cytoplasm and nucleus combined Signup and view all the answers

Which term best describes the property of cell membranes that permits selective passage of substances?

Selective Permeability Signup and view all the answers

What role does DNA primarily serve in living organisms?

Containment of genetic information Signup and view all the answers

What study focuses specifically on the structure and function of cells?

Cytology Signup and view all the answers

How do variations in DNA contribute to biological diversity?

By leading to differences in DNA sequences Signup and view all the answers

What is the defining feature of eukaryotic cells?

Presence of a membrane-bound nucleus Signup and view all the answers

Which of the following is not a common component of all cells?

Nucleus Signup and view all the answers

Which structure is responsible for regulating movement in and out of the cell?

Cell membrane Signup and view all the answers

What role does the nucleolus play within the nucleus?

Synthesis of ribosomal RNA Signup and view all the answers

What is the function of the cytosol in a cell?

Medium for biochemical reactions Signup and view all the answers

How are prokaryotic cells primarily differentiated from eukaryotic cells?

Lack of a membrane-bound nucleus Signup and view all the answers

Which of the following best describes organelles?

Structures that perform specific functions Signup and view all the answers

Which type of cell specializes in transmitting electrical signals?

Nerve cells Signup and view all the answers

What distinguishes eukaryotic cells from prokaryotic cells?

Eukaryotic cells have a defined nucleus. Signup and view all the answers

Which structure serves as the control center of a eukaryotic cell?

Nucleus Signup and view all the answers

What is one of the main functions of the cell membrane?

To regulate the movement of substances in and out of the cell. Signup and view all the answers

Which component is not typically found in prokaryotic cells?

Nucleus Signup and view all the answers

Which organelle is responsible for energy production within a eukaryotic cell?

Mitochondria Signup and view all the answers

What is the primary component of the cytoplasm?

Cytosol Signup and view all the answers

How do specialized cells differ from non-specialized cells?

Specialized cells perform unique functions. Signup and view all the answers

What is a key structural feature of the nuclear membrane?

It contains pores for material exchange. Signup and view all the answers

What is the primary role of vacuoles in plant cells, apart from storage?

Maintaining turgor pressure Signup and view all the answers

Which component is primarily responsible for energy production in a cell?

Mitochondria Signup and view all the answers

What best describes cellular respiration?

The conversion of glucose and oxygen into energy Signup and view all the answers

Which term refers to the living content of a cell?

Protoplasm Signup and view all the answers

What do variations in DNA primarily contribute to?

Biological diversity Signup and view all the answers

Which part of the cell membrane allows selective movement of substances?

Lipid bilayer Signup and view all the answers

Which microscope feature is essential for studying microscopic cells?

High magnification capability Signup and view all the answers

What is the significance of cristae in mitochondria?

Increase surface area for energy production Signup and view all the answers

What is a distinguishing feature of eukaryotic cells compared to prokaryotic cells?

Defined nucleus enclosed by a membrane Signup and view all the answers

Which of the following correctly identifies the composition of the cell membrane?

A thin, flexible layer composed of lipids and proteins Signup and view all the answers

What is the main role of cytoplasm within a cell?

To house organelles and facilitate chemical reactions Signup and view all the answers

Which of the following statements best describes prokaryotic cells?

Lack a membrane-enclosed nucleus and organelles Signup and view all the answers

What structure within a eukaryotic cell regulates various cellular activities?

Nucleus Signup and view all the answers

Which type of cells typically shows specialization in function, such as transmitting electrical signals?

Animal nerve cells Signup and view all the answers

What is the primary component of the cytoplasm that consists of water, salts, and organic molecules?

Cytosol Signup and view all the answers

What characterizes the nucleolus found within the nucleus of eukaryotic cells?

Synthesizes ribosomal RNA Signup and view all the answers

What characteristic of red blood cells enhances their ability to carry oxygen?

Biconcave shape to increase surface area Signup and view all the answers

Which function of vacuoles is essential for plant cells?

Maintaining turgor pressure to support cell structure Signup and view all the answers

Which part of the mitochondria is primarily responsible for increasing the surface area for energy production?

Cristae Signup and view all the answers

What role does cellular respiration play in cells?

Generates usable energy from glucose and oxygen Signup and view all the answers

Which of the following options best represents a characteristic of DNA?

It is the hereditary material that determines inherited traits Signup and view all the answers

What distinguishes protoplasm from cytoplasm?

Protoplasm comprises both the cytoplasm and the nucleus Signup and view all the answers

What is the significance of selective permeability in a cell membrane?

It ensures that only essential nutrients and ions can pass through Signup and view all the answers

How do variations in DNA contribute to evolutionary diversity?

Through mutations that introduce new genetic sequences Signup and view all the answers

Gr 9 Natural Sciences Ch 1: Cell structure

Questions and Answers

What is the primary function of mitochondria?

What shape do red blood cells have to assist their function?

What is the main role of vacuoles in plant cells?

Which of the following best describes the cytoplasm?

What defines selective permeability in a cell membrane?

What does DNA stand for?

What is cytology?

What is a key function of protoplasm in a cell?

What is the primary function of the cell membrane?

Which of the following is a characteristic feature of eukaryotic cells?

Which component of the cell is responsible for containing organelles?

What type of cells are bacteria categorized as?

What is the role of the nucleolus within the nucleus?

Which structure in eukaryotic cells contains the genetic material?

How do cells specialize in function and structure?

Which of the following organelles is found in the cytoplasm of a eukaryotic cell?

What is the primary reason for the biconcave shape of red blood cells?

What is one of the structural features of mitochondria?

How does a vacuole contribute to cell function in plants?

What encompasses the living content of a cell?

Which term best describes the property of cell membranes that permits selective passage of substances?

What role does DNA primarily serve in living organisms?

What study focuses specifically on the structure and function of cells?

How do variations in DNA contribute to biological diversity?

What is the defining feature of eukaryotic cells?

Which of the following is not a common component of all cells?

Which structure is responsible for regulating movement in and out of the cell?

What role does the nucleolus play within the nucleus?

What is the function of the cytosol in a cell?

How are prokaryotic cells primarily differentiated from eukaryotic cells?

Which of the following best describes organelles?

Which type of cell specializes in transmitting electrical signals?

What distinguishes eukaryotic cells from prokaryotic cells?

Which structure serves as the control center of a eukaryotic cell?

What is one of the main functions of the cell membrane?

Which component is not typically found in prokaryotic cells?

Which organelle is responsible for energy production within a eukaryotic cell?

What is the primary component of the cytoplasm?

How do specialized cells differ from non-specialized cells?

What is a key structural feature of the nuclear membrane?

What is the primary role of vacuoles in plant cells, apart from storage?

Which component is primarily responsible for energy production in a cell?

What best describes cellular respiration?

Which term refers to the living content of a cell?

What do variations in DNA primarily contribute to?

Which part of the cell membrane allows selective movement of substances?

Which microscope feature is essential for studying microscopic cells?

What is the significance of cristae in mitochondria?

What is a distinguishing feature of eukaryotic cells compared to prokaryotic cells?

Which of the following correctly identifies the composition of the cell membrane?

What is the main role of cytoplasm within a cell?

Which of the following statements best describes prokaryotic cells?

What structure within a eukaryotic cell regulates various cellular activities?

Which type of cells typically shows specialization in function, such as transmitting electrical signals?

What is the primary component of the cytoplasm that consists of water, salts, and organic molecules?

What characterizes the nucleolus found within the nucleus of eukaryotic cells?

What characteristic of red blood cells enhances their ability to carry oxygen?

Which function of vacuoles is essential for plant cells?

Which part of the mitochondria is primarily responsible for increasing the surface area for energy production?

What role does cellular respiration play in cells?

Which of the following options best represents a characteristic of DNA?

What distinguishes protoplasm from cytoplasm?

What is the significance of selective permeability in a cell membrane?

How do variations in DNA contribute to evolutionary diversity?

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