Tag: unit of living - cell

Questions Related to unit of living - cell

Any organism composed of eukaryotic cells is also considered a

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Eukaryotic organism

  2. Eukaryotic

  3. Eukaryotic species

  4. None of these

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Correct Option: A
Explanation:

Any organism composed of eukaryotic cells is also considered a eukaryotic organism.

The eukaryotic cells are represented by 

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Fungi

  2. Animal cell

  3. Plant cell

  4. All of the above

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Correct Option: D
Explanation:

Eukaryotes are organisms whose cells have well-developed membrane bound nucleus and organelles such as mitochondria, Golgi body, ER etc. Animals, plants, fungi and protists are eukaryotes.

The projections of different lengths protruding out of the body of Amoeba is called as

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Walking legs

  2. Limbs

  3. Pseudopodia

  4. Needle

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Correct Option: C
Explanation:

Pseudopodia, are the locomotory organs, which are mainly present in the prokaryotic cell or the unicellular protist. These are cytoplasm filled temporary projections. These are also used for the process such as phagocytosis. It is also used in major mechanism to remove pathogens and cell debris e.g.,

Amoeba.

A yeast cell differs from a bacterial cell as it is

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Multicellular

  2. Prokaryotic

  3. Eukaryotic

  4. Unicellular

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Correct Option: C
Explanation:
Yeasts are eukaryotic cells and bacteria are prokaryotic cells. Yeasts have their DNA contained within a nucleus. Bacteria lack a nucleus and their DNA is more or less scattered within their cytoplasm.
Therefore, the correct answer is option C.

Plants and animals are ________

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Prokaryotic

  2. Eukaryotic

  3. Both A and B

  4. None of the above

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Correct Option: B
Explanation:

Plant and animal cells are both eukaryotic cells so they have several features in common, such as the presence of a cell membrane and cell organelles like the nucleus, mitochondria, and endoplasmic reticulum.

Read the passage and answer the following question.

A student, using a compound microscope, with a $10 \times $ ocular lens and a $4 \times $ objective lens measured his field of view with a plastic ruler and found it to be $4 mm$. He then placed some of his cheek cells on a slide, found them using the $4 \times$ objective lens and switched to the $40 \times$ objective lens. He counted twelve cells, side by side, that stretched from one side of the field of view to the other. 

The diameter of a cheek cell is
bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. $0.033 mm$

  2. $0.132 mm$

  3. $0.0132 mm$

  4. $0.0033 mm$

  5. $1.32 mm$

Show answer
Correct Option: A
Explanation:
Ocular lens $ = 10x $
Objective lens $ = 4x $
Field of view $ = 4\,mm $
When he placed cheek cell using $ 4x $ objective lens and the $ 40x $ objective lens.
$ \Rightarrow $ Diameters of cheek cell is $ 0.033\,mm $ 

Identify the odd one out.

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Chromosome

  2. Gamete

  3. Nucleus

  4. Gene

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Correct Option: B
Explanation:

The odd one out of the following options is the gamete. The chromosome, nucleus and the gene are the parts of the DNA. The chromosomes are the condensed form of the DNA and histones. The nucleus is the site where the DNA is present and the gene is the segment of DNA which encodes for the proteins. The gamete is the haploid cell which is produced by the meiotic division of the germ cells. 

Thus, the correct answer is option B. 

Arrange the following cell organelles in descending order based on their size.
P-Chloroplast, Q-Ribosome, R-Nucleus, S-Lysosome

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. Q, S, P, R

  2. Q, S, R, P

  3. R, P, S, Q

  4. R, P, Q, S

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Correct Option: C
Explanation:
R- The size of the nucleus is about 1.7 x 10$^{-9}$ µm. 
P- The chloroplasts have the size of 3 µm. 
S- The size of the lysosomes is 0.1-1 µm. 
Q- The size of the ribosomes is about 0.02 µm. 

Thus, the correct answer is option C. 

The similarities between prokaryotes and eukaryotes is

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. They both have endoplasmic reticulum

  2. They both have DNA

  3. They both have ribosomes

  4. They have both endoplasmic reticulum and ribosomes

  5. They have both DNA and ribosomes

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Correct Option: E
Explanation:
  • Prokaryotes are the organisms, that lack membrane-bound organelles while eukaryotes have these organelles. 
  • ER is a eukaryotic organelle with a network of tubules, vesicles, and cisternae within the cells.
  • Ribosomes are the nonmembrane bound organelles and are found in both prokaryotes and eukaryotes. 
  • DNA is the genetic material present in both prokaryotes and eukaryotes.

    Hence, the correct answer is option E.

Which characteristics are shared by chromosomes and ribosomes of eukaryotic cell?

bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

  1. They consist of nucleic acid.

  2. They consist of protein.

  3. They are in the nucleus.

  4. A and B

  5. A and C

Show answer
Correct Option: D
Explanation:

The chromosomes are composed of DNA and histone proteins. The ribosomes are composed of RNA and proteins. Both the structures contain the nucleic acid as well as proteins in them. The chromosomes are found in the nucleus but the ribosomes are present in the cytoplasm and on the surface of RER. 

Thus, the correct answer is option 'A and B'.