Pseudomyrmex ants live exclusively in the swollen thorns of acacia trees. In return for food and shelter provided by the trees, the ants aggressively defend the tree from leaf-eating insects. This interaction between ants and acacias represents an example of

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#Question id: 5754

#Unit 8. Inheritance Biology

A cell is exposed to EMS (a mutagen that causes guanine to mispair with thymine) and allowed to undergo a few rounds of DNA replication.  The mutational event caused by this mutagen will be

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#Question id: 294

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following pairs of amino acids would you predict to only participate in Van der Waals interactions in the three dimensional folding of a protein:

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#Question id: 33237

#Unit 1. Molecules and their Interaction Relevant to Biology

In case of enzymes, Na⁺, K⁺, or Ca²⁺ are the ions 

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#Question id: 31227

#Unit 2. Cellular Organization

Fission yeast cells carrying a CDK1 mutation in which the tyrosine-15 residue is replaced by phenylalanine, what will be the result?

a) Shows larger than normal cells

b) Shows smaller than normal cells

c) allows the phosphorylation of phenylalanine and normal cell proliferation are seen

d) premature mitotic CDK activation and entry into mitosis

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#Question id: 11123

#Unit 9. Diversity of Life Forms

Cladograms (a type of phylogenetic tree) constructed from evidence from molecular systematics are based on similarities in