HSCs express which type of cell-surface molecule, which is the receptor for stem cell factor (SCF). It is a cytokine that exists in both membrane-bound and soluble forms and the SCF-surface molecules interaction is critical for the development, in adult animals, of multipotential progenitor cells (MPPs).  Which type of surface molecules HSCs express?

#Question id: 18372

#Unit 12. Applied Biology

#Question id: 4704

#Unit 11. Evolution and Behavior

About thirteen different species of finches inhabit the Galápagos Islands today, all descendants of a common ancestor from the South American mainland that arrived a few million years ago. Genetically, there are four distinct lineages, but the thirteen species are currently classified among three genera. The first lineage to diverge from the ancestral lineage was the warbler finch (genus Certhidea). Next to diverge was the vegetarian finch (genus Camarhynchus), followed by five tree finch species (also in genus Camarhynchus) and six ground finch species (genus Geospiza). If the six ground finch species have evolved most recently, then which of these is the most logical prediction?

#Question id: 4789

#Unit 8. Inheritance Biology

Red flower in plant mediated by three non-allelic genes as a follows Homozygous for mutant allele a ,b,c at any locus give white flower. A plant with Genotype Aabbcc is cross with genotype aaBbCc Plant. What is proportional of white flower among their offspring?

#Question id: 890

#Unit 1. Molecules and their Interaction Relevant to Biology

Some of the misfolded protein or defective Protein causes disease as follows;

               Disease                                             Defective Protein

A)  Parkinson’s disease                                  i) Amyloid-β protein

B)  Alzheimer’s disease                                  ii) Superoxide dismutase

C) Huntington’s disease                                iii) Lysozyme

D) Lysozyme amyloidosis                             iv) α-Synuclein

E) Amyotrophic lateral sclerosis                   v) polyglutamate expansion

Match the correct disease with its misfolded proteins;

#Question id: 3515

#Unit 8. Inheritance Biology

What proportional of F2 round seeded plant would produce all round plant after self fertilization?