Tag: unit of living - cell

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Questions Related to unit of living - cell

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

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

  1. Walking legs

  2. Limbs

  3. Pseudopodia

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

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

A yeast cell differs from a bacterial cell as it is

  1. Multicellular

  2. Prokaryotic

  3. Eukaryotic

  4. Unicellular
Reveal answer Fill a bubble to check yourself
C Correct answer
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.
Multiple choice bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell
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
  1. $0.033 mm$
  2. $0.132 mm$
  3. $0.0132 mm$
  4. $0.0033 mm$
  5. $1.32 mm$
Reveal answer Fill a bubble to check yourself
A Correct answer
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 $ 
Multiple choice bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

Identify the odd one out.

  1. Chromosome

  2. Gamete

  3. Nucleus

  4. Gene
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

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

  1. Q, S, P, R

  2. Q, S, R, P

  3. R, P, S, Q

  4. R, P, Q, S
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

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

The similarities between prokaryotes and eukaryotes is

  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
Reveal answer Fill a bubble to check yourself
E Correct answer
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.
Multiple choice bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

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

  1. <p>They consist of nucleic acid.</p>

  2. <p>They consist of protein.</p>

  3. <p>They are in the nucleus.</p>

  4. A and B

  5. A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.