A point mutation substitutes any other amino acid

for the glycine12 in the Ras, the normal protein is converted into a constitutively active oncoprotein

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#Id: 3616

#Unit 3. Fundamental Processes

A reading frame without a termination codon among 50 or more codons is referred to as an open reading frame (ORF).

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#Id: 1526

#Unit 2. Cellular Organization

Microtubules can be stabilized by side-binding microtubule associated proteins (MAPs).

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#Id: 1053

#Unit 5. Developmental Biology

Hox11 paralogues specify the zeugopod

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#Id: 9745

#Unit 6. System Physiology – Plant

According to Optimal Defense Hypothesis, 

Young tissues not only contain the highest levels of constitutive secondary compounds, they are also more responsive to herbivory. Thus, younger leaves exhibit more robust inducible defenses to herbivores than older leaves.

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#Id: 2157

#Unit 9. Diversity of Life Forms

Phylogenetic relationships among species in a radiation are difficult to determine for two related reasons.                                                                 

a. During the short time between two successive speciation events, few new mutations are fixed.                                                                               

b. Incomplete lineage sorting may occur during rapid diversification.