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Quiz about The World of a Cell
Quiz about The World of a Cell

The World of a Cell Trivia Quiz


This quiz is all about the cell, its anatomical, physiological, and biochemical aspects. Get ready, and enjoy answering and learning! Tip: Use your imagination well.

A multiple-choice quiz by AlvarezMD. Estimated time: 5 mins.
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Author
AlvarezMD
Time
5 mins
Type
Multiple Choice
Quiz #
336,863
Updated
Dec 03 21
# Qns
10
Difficulty
Tough
Avg Score
6 / 10
Plays
1020
- -
Question 1 of 10
1. What organic compound is greatly responsible for the fluid-like consistency of the plasma membrane? Hint


Question 2 of 10
2. What part of the plasma membrane functions as channels for hydrophilic substances (such as glucose and salts) so that they can move in and out of the cell? Hint


Question 3 of 10
3. Identify the organelle that is known as the "powerhouse of the cell". Its function is to provide the cell with chemical energy, in the form of ATP (adenosine triphosphate) via cellular respiration. Hint


Question 4 of 10
4. Glycolysis is the breakdown of glucose into smaller molecules needed for either fermentation or cellular respiration. It is also known as the substrate-level of phosphorylation since it uses glucose as a substrate to produce ATP.

Aside from ATP, what is the other major end product of glycolysis?
Hint


Question 5 of 10
5. Osmosis is the movement of water molecules passing through a semi-permeable membrane. The direction of the movement of water is influenced by the difference in the concentration between the two solutions separated by the semi-permeable membrane.

If the plasma membrane is the semi-permeable membrane, and water from inside the cell moved to the outside of the cell, what can you say about the solution that is found outside the cell?
Hint


Question 6 of 10
6. G-protein is a trimeric protein composed of three sub-units. These three sub-units are the alpha, beta, and gamma sub-units. In its INACTIVE state, GDP or guanine diphosphate is bound to which sub-unit of the G-protein? Hint


Question 7 of 10
7. Transcription is a process where an mRNA is produced using DNA as a template. What is the light-staining region found in the eukaryotic nucleus where transcription is very active? Hint


Question 8 of 10
8. The Golgi apparatus modifies proteins and prepares them for secretion or storage. Which part of the Golgi apparatus do proteins enter? Hint


Question 9 of 10
9. Which of the following is NOT TRUE regarding bacteria? Hint


Question 10 of 10
10. Which of the following is NOT included in the classic cell theory? Hint



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Feb 10 2024 : mazza47: 5/10
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quiz
Quiz Answer Key and Fun Facts
1. What organic compound is greatly responsible for the fluid-like consistency of the plasma membrane?

Answer: cholesterol

Cholesterol is a lipid-soluble substance found within the hydrophobic areas of the phospholipid bilayer. They prevent the phospholipid molecules from getting too close to each other, and thereby preventing the plasma membrane to become a rigid structure.
2. What part of the plasma membrane functions as channels for hydrophilic substances (such as glucose and salts) so that they can move in and out of the cell?

Answer: integral proteins

Integral proteins can be found across the phospholipid bilayer. This means they are perpendicular in respect to the plasma membrane. Their structure allows passage of hydrophilic or ionic substances across the membrane. Since these substances are not lipid-soluble, they do not easily diffuse and go inside the cell.
3. Identify the organelle that is known as the "powerhouse of the cell". Its function is to provide the cell with chemical energy, in the form of ATP (adenosine triphosphate) via cellular respiration.

Answer: mitochondrion

The mitochondria is an essential part of the cell because this is where cellular respiration occurs. This process requires the presence of oxygen and it yields numerous ATP, the energy currency of cells. It has a circular DNA found within the mitochondiral matrix, and can therefore multiply on its own by binary fission.
4. Glycolysis is the breakdown of glucose into smaller molecules needed for either fermentation or cellular respiration. It is also known as the substrate-level of phosphorylation since it uses glucose as a substrate to produce ATP. Aside from ATP, what is the other major end product of glycolysis?

Answer: pyruvate

Pyruvate is either converted to acetyl CoA in the mitochondria in the presence of oxygen (during aerobic conditions) or fermented in the cytoplasm to produce lactic acid in the absence of oxygen (during the anaerobic conditions).
5. Osmosis is the movement of water molecules passing through a semi-permeable membrane. The direction of the movement of water is influenced by the difference in the concentration between the two solutions separated by the semi-permeable membrane. If the plasma membrane is the semi-permeable membrane, and water from inside the cell moved to the outside of the cell, what can you say about the solution that is found outside the cell?

Answer: it is a hypertonic solution

In osmosis, the water molecules always go to the direction where a solution has a higher concentration of solute. When water moves out of the cell (causing cell shrinking or crenation), the solution outside the cell is said to be hypertonic. When water moves into the cell (causing cell bursting), the solution outside the cell is said to be hypotonic.

When there is NO net movement of water going in or out the cell, the solution outside the cell is isotonic.
6. G-protein is a trimeric protein composed of three sub-units. These three sub-units are the alpha, beta, and gamma sub-units. In its INACTIVE state, GDP or guanine diphosphate is bound to which sub-unit of the G-protein?

Answer: alpha sub-unit

The activated G-protein has a GTP bound to the alpha sub-unit. The alpha sub-unit is dissociated from the beta and gamma sub-units when it is in its active state. The activate state of the alpha G-protein sub-unit can cause a second messenger known as cyclic adenosine monophosphate (cAMP) to be produced, catalyzed by the enzyme adenyl cyclase.
7. Transcription is a process where an mRNA is produced using DNA as a template. What is the light-staining region found in the eukaryotic nucleus where transcription is very active?

Answer: euchromatin

The heterochromatin is a region in the nucleus (dark-staining in histological preparations) that is inactive in the process of transcription. Meanwhile, euchromatin (light-staining) is active.
8. The Golgi apparatus modifies proteins and prepares them for secretion or storage. Which part of the Golgi apparatus do proteins enter?

Answer: cis face

The Golgi apparatus is an organelle of a cell which functions for post-modifications of proteins. These proteins come from the the rough endoplasmic reticulum. They enter the Golgi apparatus on the cis face and leaves the organelle through the trans face.

The cis face is some-what covex in form, while the trans face is some-what concave. Modified proteins exit the Golgi apparatus and are either brought to the plasma membrane through secretory vesicles to be exocytosed, or they are stored in storage vesicles for future use.
9. Which of the following is NOT TRUE regarding bacteria?

Answer: Gram positive bacteria contain lipopolysaccharide on their outer leaflet.

Gram positive bacteria do NOT have lipopolysaccharide in their outer leaflets. Lipopolysaccharides can be found in Gram negative bacteria. Lipopolysaccharide is responsible for the sensitivity of humans to bacteria, causing inflammation.
10. Which of the following is NOT included in the classic cell theory?

Answer: Cells are always microscopic and never seen by an unaided eye

Not all cells are microscopic. Some cells can be seen by an unaided / naked eye. An egg cell / ovum is 0.12 mm, and a skeletal muscle cell diameter is 0.1 mm.
Source: Author AlvarezMD

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