Tag: cell wall

Quizzes (3) Questions (22)

Questions Related to cell wall

Multiple choice biology the fundamental unit of life introduction to cell what are the living organisms made of organisation of the organism cell membrane and cell wall cell wall cell division in embryo development

What is an isotonic solution?

  1. A solution whose water concentration is lower than the internal concentration.

  2. A solution whose water concentration is same as compared to internal concentration.

  3. A solution whose water concentration is more than the internal concentration.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • If both the medium and cell has exactly the same water concentration and thus, there will be no net movement of water across the cell membrane is known as an isotonic solution. 
  • The cells remain of the same size.

    Hence, the correct option is B.
Multiple choice biology the fundamental unit of life introduction to cell what are the living organisms made of organisation of the organism cell membrane and cell wall cell wall cell division in embryo development

In a hypotonic solution, the cell 

  1. Shrinks

  2. Remains of the same size

  3. Swells

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hypotonic solution is a type of solution in which water concentration in the medium is more than the cell. Water crosses the membrane in both directions, but more water will come into the cell than will leave. The net result is that the water enters the cell. The cells will swell up. 

Multiple choice biology the fundamental unit of life introduction to cell what are the living organisms made of organisation of the organism cell membrane and cell wall cell wall cell division in embryo development

Solution that has a greater concentration of solutes on the outside of a cell when compared with the inside of a cell is a 

  1. Hypertonic solution

  2. Isotonic solution

  3. Hypotonic solution

  4. Both A and C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A hypertonic solution is a particular type of solution that has a greater concentration of solutes on the outside of a cell when compared with the inside of a cell. Water crosses the cell membrane in both directions, but more water leaves the cell than enters it. Therefore, the cell will shrink due to exosmosis.

Multiple choice biology the fundamental unit of life introduction to cell what are the living organisms made of organisation of the organism cell membrane and cell wall cell wall cell division in embryo development

If a cell is in a hypotonic environment, this means

  1. There are fewer solutes inside the cell than in the extra-cellular environment

  2. There is an equal amount of solutes inside as outside the cell

  3. There is more solute outside the cell than in the cell

  4. There is less solute outside the cell than inside of the cell
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A hypotonic environment is when the solute concentration outside the cell is less than inside the cell.

When both the regions have the same solute concentration it is an isotonic environment.
When the solute concentration outside the cell is higher than inside the cell then it is in a hypertonic environment.
So the correct answer is 'There is less solute outside the cell than inside the cell'.

Multiple choice biology the fundamental unit of life introduction to cell what are the living organisms made of organisation of the organism cell membrane and cell wall cell wall cell division in embryo development

Roots will absorb water when external medium will be

  1. Hypotonic

  2. Hypertonic

  3. Isotonic

  4. Concentrated
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Osmosis happens along a concentration gradient. If outside medium is hypotonic, it means that relatively more of water is present outside the cells in the surrounding medium and water will flow inside the root hair cells.

Multiple choice biology division for growth and reproduction cell membrane and cell wall cell wall cell division in embryo development structure of chromosome, cell cycle and cell division component of the cell different types of reproduction reproductive health of humans need of family planning tissues of animals mitosis reproductive health

Cell cycle was divided into  four stages i.e. G$ _1$, S, G$ _2$, M by

  1. W. Flemming

  2. Strass burger

  3. Howard and Pelc

  4. Farmer
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Howard and Pelc divided cell cycle in four stage. The cell cycle is an ordered set of events, culminating in cell growth and division into two daughter cells. Non-dividing cells not considered to be in the cell cycle. The stages  are G$ _1$-S-G$ _2$-M. The G$ _1$ stage stands for "GAP 1". The S stage stands for "Synthesis". This is the stage when DNA replication occurs. The G$ _2$ stage stands for "GAP 2". The M stage stands for "mitosis", and is when and cytoplasmic division occur.

Multiple choice biology cell and cell organelles cell membrane and cell wall cell wall cell division in embryo development component of the cell cell organelles cell: the unit of life cell as structural and functional unit basics of cell

Match the following.

Column I Column II
A. Bacteria 1. Synthesis and storage of lipids
B. Sphaerosomes   2. Idiogram
C. Chloroplasts 3. Glycocalyx
D. Karyotype 4. Thylakoids

  1. A-3, B-2, C-4, D-1

  2. A-3, B-1, C-2, D-4

  3. A-4, B-3, C-2, D-1

  4. A-1, B-2, C-3, D-4

  5. A-3, B-1, C-4, D-2
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Sphaerosomes are single half unit membrane covered small spherical organelles which synthesize and store fats. The cell wall of bacteria is made up of glycocalyx (carbohydrate and amino acids). Chloroplasts are eukaryotic plant cell organelles which have an internal thylakoid membrane system. The thylakoid membranes carry out the light reactions part of photosynthesis. The chromosomes of a eukaryotic cells are called its karyotype. The diagrammatic representation of a cells karyotype is called an idiogram.

Multiple choice biology cell and cell organelles cell membrane and cell wall cell wall cell division in embryo development

During breakdown of lecithin which of the following is not obtained?

  1. Trihydroxy propane

  2. Fatty acid

  3. Choline

  4. Sphingosine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Lecithin is also known as phosphatidylcholine (a group of phospholipids) which are important for maintaining the cell structure and metabolism.
  • Lecithins are composed of phosphoric acid, choline, esters of glycerol and two fatty acids. 
  • Thus, during the breakdown of lecithin fatty acid, choline and sphingosine are obtained.
  • So the correct answer is 'Trihydroxy propane'.
Multiple choice biology cell and cell organelles cell membrane and cell wall cell wall cell division in embryo development

Organelles that are surrounded by two membranes are-

  1. Nucleus and mitochondria.

  2. Nucleus and Golgi bodies.

  3. Endoplasmic reticulum and Lysosomes.

  4. Endoplasmic reticulum and Mitochondria.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitochondria and the nucleus are both organelles enclosed by a double membrane system. Golgi bodies and endoplasmic reticulum are single-membrane bound.