Tag: component of the cell

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Questions Related to component of the cell

Multiple choice biology organisation of the organism introduction to cell what are the living organisms made of component of the cell

The structure that are involved in the manufacture and supply of energy to the cell are:

  1. Centroies

  2. Nucleoius

  3. Pestide

  4. Mitochondria
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mitochondria is responsible for manufacturing and supplying chemical energy by releasing energy stored in food molecules and synthesising ATP. It is called the power house of the cell. 

So, the correct option is 'Mitochondria'.

Multiple choice biology organisation of the organism introduction to cell what are the living organisms made of component of the cell

The function of bulliform cells is to.

  1. These are present in some desertic grasses

  2. These are large and empty

  3. Reduce the rate of transpiration

  4. Perform nitrogen fixation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bulliform cells are specialized large, bubble-shaped epidermal motor cells found in the upper epidermis of many monocot leaves, such as grasses. When water is abundant, they are turgid and cause the leaf to expand, but under water stress, they lose turgor and cause the leaf to roll or fold, which helps reduce the rate of transpiration. The other options describe general characteristics or incorrect physiological roles.

Multiple choice biology organisation of the organism introduction to cell what are the living organisms made of component of the cell

Assume a spherical mammalian cell has diameter of 27 $\mu m$, If a polypeptide chain with alpha helical canfoemation has to stretch across the cell, how many amino acids should it comprise of: 

  1. 18000

  2. 27000

  3. 1800

  4. 12000
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

No. of amino acid in one term in α helix = 3.6

Pitch length for α Helix = 5.4 Aº  
The No. of Amino acid in polypeptide
= 1.8 x $10^4$ Amino acid = 18000 amino acid
Thus A is the correct answer.

Multiple choice biology organisation of the organism introduction to cell what are the living organisms made of component of the cell

Branched sclerenchyma occurring as isolated cells scattered in any tissue are called.

  1. Libriform fibers

  2. Tracheidal cells

  3. Idioblasts

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

Idioblasts are isolated, specialized plant cells that differ significantly from neighboring cells and can contain various contents or have distinct shapes, such as branched sclerenchyma cells. Libriform fibers are elongated wood fibers, and stone cells (sclereids) are typically not described as isolated branched cells in the same sense as idioblasts.

Multiple choice biology organisation of the organism introduction to cell what are the living organisms made of component of the cell

Auxospores are formed by _____________.

  1. Diatoms

  2. Dimities

  3. Deuteromycetes

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

Auxospore. In certain species of diatoms, auxospores are specialised cells that are produced at key stages in their cell cycle or life history.  Auxospores can also play a role in sexual reproduction in diatoms, and may be formed after haploid gametes fuse to form a diploid zygote.

Thus the correct option is A. 

Multiple choice biology organisation of the organism introduction to cell what are the living organisms made of component of the cell

Which of the following is codons codes for proline.

  1. CCC, CCU, CCG

  2. UCC, UGU, CCU

  3. CUG, CUU, CUA

  4. CGC, CGG, CCA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Proline is encoded by four codons: CCU, CCC, CCA, and CCG. Option A lists three of these four codons correctly. The other options contain codons for different amino acids or incorrect combinations.

Multiple choice biology organisation of the organism introduction to cell what are the living organisms made of component of the cell

Axenic culture is best defined as 

  1. Cell cultures

  2. Cell cultures free from micro-organisms

  3. Cell cultures of insectivorous plants

  4. Cell cultures free from other micro-organisms
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Axenic culture refers to a culture that is free from any other living organisms, meaning it contains only the specific organism being studied.

Multiple choice biology organisation of the organism introduction to cell what are the living organisms made of component of the cell

Secretion, endocytosis, division and formation of intercellular junctions are functions of cells due to

  1. Flip-flop movement of proteins

  2. Fluid nature of lipid and proteins

  3. Quassi-fluid nature of lipids

  4. Vertical movement of lipid and proteins
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The fluid mosaic model describes the plasma membrane as a fluid structure where lipids and proteins can move laterally, facilitating processes like secretion, endocytosis, and cell division.