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Cell/Organelles Practice test

Total questions: 57

Worksheet time: 29mins

Name
Class
Date
1.

Which factor most influences the rate of diffusion across a membrane?


a)

ATP levels

b)
  1. Cell size


c)
  1. Concentration gradient


d)

Nucleus Size

2.

Evaluate this historical claim: "Spontaneous generation was disproved through experiments that supported the cell theory." How would you assess this statement?


a)
  1. The statement is correct because experiments by scientists like Pasteur showed that microorganisms come from pre-existing microorganisms, not spontaneously

b)
  1. The statement is correct because cell theory states that all cells arise from pre-existing cells (the principle of biogenesis). 

3.

A biologist is studying the internal structure of mitochondria at the molecular level. She needs an image that reveals detailed internal features of the organelle. Which microscope should she select, and why?


a)
  1. Scanning electron microscope (SEM), because it provides detailed images of surface textures.


b)
  1. Transmission electron microscope (TEM), because it provides high-resolution images of internal cell structures.


c)
  1. Light microscope, because it allows observation of living cells in natural color.


d)
  1. Dissecting microscope, because it allows low magnification and depth perception.


4.

Cyanobacteria are prokaryotic organisms commonly found in streams and ponds as chains of cells. The major parts of a cyanobacteria cell are labeled.
Which structural characteristic of a cyanobacteria cell is similar to a characteristic of a plant cell only?


a)

ribosomes

b)
  1. photosynthetic membrane (contains chlorophyll)


c)
  1. cytoplasm


d)

DNA

5.

Identify one structural characteristic of  a cyanobacteria cell that are different from characteristics of a plant cell.


a)
  1. DNA without a nucleus


b)

ribosomes

c)
  1. plasma membrane.


d)
  1. cell wall


6.

Which statement best explains why diffusion alone cannot meet the needs of large multicellular organisms?

a)
  1. Diffusion increases ATP production.

b)
  1. Diffusion provides energy for transport.

c)

Diffusion requires transport proteins.

d)
  1. Diffusion is too slow over long distances to supply all cells efficiently.

7.

The following picture is an image of red blood cells under a microscope.

A lab technician observes a blood sample under a microscope. The red blood cells appear shriveled and have a spiky, star-shaped appearance (crenation).

The technician is asked to identify the condition of the solution the cells were placed in.

a)
  1. Hypertonic; the net movement of water is out of the cells, causing them to shrink and shrivel (crenation).

b)
  1. Isotonic; there is no net movement of water across the cell membrane, and the cells maintain their normal shape.

c)
  1. Hypertonic; the net movement of water is into the cells due to the high solute concentration outside the cell.

d)


Hypotonic; the net movement of water is into the cells by osmosis, causing them to swell and potentially lyse.

8.

Which situation best demonstrates selective permeability?

a)
  1. Ions move randomly in both directions.

b)
  1. The cell wall blocks all materials.

c)
  1. The membrane allows oxygen to pass but not glucose.

d)
  1. Water and glucose move equally across the membrane.

9.


Which of the following is a function of the nucleus in organism 2?

a)
  1. releasing usable energy

b)
  1. absorbing sunlight

c)
  1. producing food molecules

d)
  1. storing genetic material

10.

Which of the following identifies the organisms that are eukaryotic and gives the best explanation?

a)
  1. organisms 1, 2 and 3 because they are all single celled.

b)
  1. organisms 1 and 2 only, because both have a nucleus.

c)
  1. organisms 1, 2 and 3 because they all have ribosomes.

d)
  1. organisms 2 and 3 only, because both use flagella.

11.


Based on the cellular structure of organism 3, which of the following is a characteristic of the organism?

a)
  1. It can move around in its environment.

b)
  1. It can conduct photosynthesis.

c)
  1. It can produce male and female gametes.

d)
  1. It can survive for long periods by storing food.

12.

Which of the following is a prokaryotes?

a)
  1. Saccharomyces cerevisiae, baker’s yeast

b)
  1. Agricus arvensis, horse mushroom

c)
  1. Thiopedia rosea, purple sulfur bacterium

d)
  1. Rhizopus stonlonifer, bread mold fungus

13.

Amino acids, sugars and ions move across the cell membrane.  Their movement from a region of high concentration to a region of low concentration is accomplished by special proteins in the membrane.  Which of the following terms applies to this type of cell transport?

a)
  1. facilitated diffusion

b)
  1. transcription

c)
  1. osmosis

d)
  1. active transport


14.

A plant cell placed in a hypertonic salt solution shrivels and the cell membrane pulls away from the cell wall.

a)
  1. Active transport, because the cell uses ATP to remove water.

b)
  1. Facilitated diffusion, because salt ions move into the cell through carrier proteins.

c)
  1. Endocytosis, because the cell engulfs salt from the environment.

d)
  1. Osmosis, because water moves out of the cell to where solute concentration is higher.

15.

Who is credited with coining the term "cell" after observing cork under a microscope?

a)
  1. Matthias Schleiden

b)
  1. Robert Hooke

c)
  1. Theodor Schwann

d)
  1. Anton van Leeuwenhoek

16.

Which scenario illustrates dynamic equilibrium in cell transport?

a)
  1. Molecules continue to move in both directions, but overall concentration remains constant.

b)
  1. Water moves only into the cell.

c)
  1. Molecules stop moving once concentrations equalize.

d)
  1. Energy is required to maintain equal concentrations.

17.

A scientist studying two unknown cells notes that one has membrane-bound organelles. Which hypothesis can be made about their evolutionary relationship?

a)
  1. The cell without organelles performs more specialized functions.

b)
  1. The simpler cell evolved from the complex one.

c)
  1. Both cells evolved independently from viruses.

d)
  1. The cell with organelles evolved later and is more complex.

18.

A scientist observes that a certain molecule enters a cell even when its concentration inside is higher than outside. Which statement best explains this process?

a)
  1. The molecule moves by active transport using a protein pump and ATP.

b)

  1. The molecule moves by facilitated diffusion through a channel protein.

c)
  1. The molecule moves by simple diffusion through the lipid bilayer.

d)
  1. The molecule moves by osmosis through aquaporin

19.


Which of the following cell characteristics provides evidence that this cell comes from a plant and not an animal?

a)
  1. a single nucleus

b)
  1. a large vacuole

c)
  1. a semipermeable cell membrane

d)
  1. a functional mitochondrion

20.

Analyze this scenario: A scientist claims to have discovered a new type of living organism that does not contain cells. Based on the cell theory, what would be the most appropriate scientific response?

a)
  1. Assume the organism must be from another planet

b)
  1. Investigate the claim thoroughly, as it challenges a fundamental theory of biology

c)
  1. Reject the claim without investigation since it contradicts established theory

d)
  1. Accept the claim since scientific theories are frequently proven wrong

21.

Why is the cell membrane often described as a “fluid mosaic”?

a)
  1. It is made of static phospholipid layers.

b)
  1. It allows all substances to pass freely.

c)
  1. The phospholipids and proteins move within the layer, maintaining flexibility.

d)
  1. It is made entirely of proteins that form a rigid surface.

22.

The diagram below shows changes in the concentrations of sodium and potassium ions inside and outside a nerve cell.  These changes prepare the nerve cell to conduct and electrical impulse.

Which of the following processes is directly responsible for these changes in the concentrations of sodium and potassium ions inside and outside the nerve cell?

a)

  1. enzyme activity

b)
  1. osmosis

c)
  1. active transport

d)
  1. transcription

23.

Which of the following is NOT part of the cell theory?

a)
  1. The cell is the basic unit of structure and function in living things

b)
  1. All living things are composed of one or more cells

c)
  1. Cells contain DNA that is passed to daughter cells

d)
  1. Cells come from pre-existing cells

24.

In a cell, which of the following organelles most likely contains digestive enzymes?

a)
  1. chloroplast

b)
  1. lysosome

c)
  1. ribosome

d)
  1. centriole

25.

A cell is shown in the diagram below.  Which of the following cell characteristics from the choices below, provides evidence that this cell comes from a plant and not from an animal?

a)
  1. a large vacuole

b)
  1. a functional mitochondria

c)
  1. a semipermeable membrane

d)
  1. a single nucleus

26.

A student is examining plant and animal cells under a compound light microscope. Which of the following represents the correct sequence of components that light passes through?

*Condenser (light)

a)
  1. Objective lens --> specimen --> condenser--> eyepiece

b)
  1. eyepiece --> objective lens --> specimen --> Condenser

c)
  1. Specimen --> eyepiece --> condenser --> objective lens

d)
  1. Condenser --> specimen --> objective lens --> eyepiece

27.

Which invention played the biggest role in the discovery of cells by early scientists?

a)
  1. eyeglasses

b)
  1. magnifying glass

c)
  1. lens

d)
  1. compound light microscope

28.

What evidence would best support the cell theory statement that "cells come from pre-existing cells"?

a)
  1. Observing that larger organisms contain more cells

b)
  1. Watching a cell divide into two daughter cells under a microscope

c)
  1. Measuring the size of different types of cells

d)
  1. Finding that all cells contain DNA

29.

How did the development of cell theory relate to the process of science?

a)
  1. It was accepted immediately without any controversy or competing theories

b)
  1. It required advanced technology that was only developed in the 20th century

c)
  1. It evolved over time as multiple scientists made observations, developed hypotheses, and tested their ideas

d)
  1. It was developed by a single scientist who made all the key discoveries at once

30.

The diagram below represents Trichodina.

Trichodina is a eukaryotic organisms that attaches itself to fish and eats bacteria. Which of the following distinguishes Trichodina from all prokaryotes?

a)
  1. it is heterotrophic

b)
  1. it has a nucleus

c)
  1. it is unicellular

d)
  1. it has cytoplasm

31.

A bacterial cell exposed to antibiotics loses its cell wall but survives. What inference can be made about its structure?

a)
  1. The cell wall produces energy.

b)
  1. The cell wall contains genetic material.

c)
  1. The cell cannot reproduce.

d)
  1. The cell wall provides protection but is not essential for basic metabolism.

32.

If the lysosomes in an animal cell suddenly stopped functioning, what would be the most immediate effect on the cell?

a)
  1. The cell would accumulate waste and damaged organelles.

b)
  1. The cell would no longer generate energy from glucose.

c)
  1. The cell would lose its ability to regulate water movement.

d)
  1. The cell would no longer produce proteins.

33.

A student investigates how different concentrations of salt solution affect onion cells. The percentage of cells showing plasmolysis (cell membrane pulling away from the cell wall) is recorded in the picture:


What conclusion can best be drawn from this data?

  1. I

a)
  1. increasing salt concentration causes water to move into onion cells by osmosis.

b)
  1. Higher salt concentrations cause more water to leave the cells, resulting in plasmolysis.

c)
  1. Onion cells actively pump salt out of the cell to maintain homeostasis.

d)


Plasmolysis occurs because salt enters the cells, expanding the vacuole.

34.

The graph below compares glucose uptake over time for Sample A (normal muscle cells) and Sample B (muscle cells treated with a poison that inhibits ATP production).

Sample A shows a steady increase; Sample B remains nearly flat (very low uptake).


Which conclusion is most supported by the data?

a)
  1. Glucose uptake in these muscle cells requires ATP, so inhibiting ATP production prevents uptake.

b)
  1. Glucose transport is passive in these cells because uptake continues equally in both samples.

c)
  1. The poison increased membrane permeability, causing Sample B to take up more glucose.

d)
  1. The poison increased membrane permeability, causing Sample B to take up more glucose.

35.

A new product claims to improve memory by exposing users to “quantum energy waves.” The company presents testimonials and images of the device in use but provides no controlled experiments or measurable data. Which statement best evaluates this claim from a scientific perspective?

a)
  1. It is clearly scientific because it uses technical terminology and experiments with people.

b)
  1. It is superficially scientific because it mimics scientific language but lacks testable evidence.

c)
  1. It is not scientific because all health-related claims are inherently unscientific.

d)
  1. It is clearly scientific because the testimonials provide observable evidence.

36.

What is the foundational principle of Cell Theory in biology?


a)

All living things are made of atoms


b)

All living things are made of cells


37.

Who observed cork under a microscope and coined the term 'cell' in 1665?


a)

Robert Hooke


b)

Anton van Leeuwenhoek


c)

Matthias Schleiden


d)

Theodor Schwann


38.

Who stated in 1855 that all cells come from pre-existing cells?


a)

Rudolf Virchow


b)

Theodor Schwann


c)

Robert Hooke


d)

Matthias Schleiden


39.

What is the main function of ribosomes?


a)

Protein synthesis


b)

DNA replication


c)

Energy production


d)

Cell division


40.

True or False: The cell wall is found only in plant cells, bacteria, and fungi.


a)

True

b)

False

41.

Which organelle is made of a network of membranes and is involved in protein and lipid synthesis?


a)

Endoplasmic Reticulum (ER)


b)

Golgi Apparatus


c)

Mitochondria


d)

Lysosome


42.

What are the two main functions of the cell membrane?


a)

Controls what enters/exits the cell; Maintains homeostasis



b)

Synthesizes proteins; Packages cellular products


c)

Produces energy for the cell; Stores genetic material


d)

Provides structural support; Facilitates cell division


43.

What is the movement of molecules from high to low concentration called?


a)

Diffusion

b)

Active transport


c)

Osmosis

d)

Filtration

44.

What is the diffusion of water called?


a)

Osmosis

b)

Active transport


c)

Diffusion

d)

Facilitated diffusion


45.

Which process uses proteins to move molecules down the gradient?


a)

Facilitated Diffusion


b)

Osmosis

c)

Active Transport


d)

Simple Diffusion


46.

Which type of transport requires energy/ATP to move substances against the concentration gradient?


a)

Active Transport


b)

Facilitated Diffusion


c)

Passive Transport


d)

Osmosis

47.

Which type of cell has a nucleus?


a)

Prokaryotic


b)

Eukaryotic

48.

Which type of cell has circular, free DNA?


a)

Prokaryotic


b)

Eukaryotic

49.

Which type of microscope is used to view cell surface?


a)

Light Microscope


b)

Scanning Electron Microscope (SEM)


c)

Electron Microscope (TEM)


d)

Compound Microscope


50.

Which microscope provides very high resolution but can only be used with dead samples?


a)

Light Microscope


b)

Scanning Electron Microscope (SEM)


c)

Electron Microscope (TEM)


d)

Compound Microscope


51.

Fill in the blank: The function of a Light Microscope is to _________.


a)

View cells & large organelles


b)

Weigh chemicals


c)

Measure temperature


d)

Mix solutions


52.

According to the endosymbiosis theory, eukaryotic cells evolved when larger prokaryotes engulfed smaller ones, which became organelles. Name two organelles that resulted from this process.


a)

Mitochondria and chloroplasts


b)

Golgi apparatus and lysosomes


c)

Nucleus and ribosomes


d)

Endoplasmic reticulum and vacuoles


53.

What is the difference between observation and inference?


a)

Observation is direct measurement or noticing phenomena, while inference is a logical conclusion drawn from observation.


b)

Observation and inference are both guesses based on data.


c)

Observation is a guess based on previous knowledge, while inference is a direct measurement.


d)

Observation is a logical conclusion, while inference is direct measurement or noticing phenomena.


54.

Electron Microscope (TEM)                                        


a)

Electron Beam, ultra thin slices


b)

Uses light & lenses


c)

Multiple lenses


d)

Electron beam scans surface


55.

Scanning Electron Microscope (SEM) 

 Uses light & lenses


a)

True

b)

False

56.

Lysosomes are the Vacuum of the body because they


a)

Digest cell waste & pathogens and become the recycle center of the cell


b)

Holds organelles, site of chemical reactions


57.

Cell Membrane (2)


a)

Phospholipid bilayer


b)

Controls entry/exit of substances


c)

Only in plant cells, bacteria, fungi