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#Question id: 4932


Which of the following is the best hypothesis regarding origins of nucleic acids?

#XL - T Zoology
  1. DNA first

  2. RNA first

  3. DNA and RNA formed simultaneously

  4. Protein first


Answer:- Option(s): 2


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#Question id: 2074

#XL - S Microbiology

In some cells, there are many ion electrochemical gradients across the plasma membrane even though there are usually only one or two proton pumps present in the membrane. The gradients of the other ions are most likely accounted for by:

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#Question id: 2075

#XL - S Microbiology

The force driving simple diffusion is:

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#Question id: 2076

#XL - S Microbiology

An organism with a cell wall would most likely be unable to take in materials through:

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#Question id: 2077

#XL - S Microbiology

In receptor-mediated endocytosis, receptor molecules initially project to the outside of the cell. Where do they end up after endocytosis?

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#Question id: 2079

#XL - S Microbiology

According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly

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#Question id: 2080

#XL - S Microbiology

Which of the following factors would tend to increase membrane fluidity?

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