β-Carotene is the precursor of vitamin A1.
Oxidation at C-15 converts retinol to the aldehyde, retinal, and further oxidation produces retinoic acid, a hormone that regulates gene expression. 

TLS Online TPP Program

#Id: 8127

#XL - T Zoology

β-Carotene is the precursor of vitamin A1.
Oxidation at C-15 converts retinol to the aldehyde, retinal, and further oxidation produces retinoic acid, a hormone that regulates gene expression. 

TLS Online TPP Program

#Id: 8313

#XL - Q Biochemistry

3 isoforms of actin-

α - expressed only in muscle cells

β and γ - found together in almost all non-muscle cells

TLS Online TPP Program

#Id: 8312

#XL - Q Biochemistry

Actin exists as: 

a globular monomer -G-actin 

a filamentous polymer- F-actin

TLS Online TPP Program

#Id: 8311

#XL - Q Biochemistry

Actin,

basic building block of microfilaments extraordinarily well conserved among eukaryotes.

TLS Online TPP Program

#Id: 8226

#XL - Q Biochemistry

I-cell disease

• almost all of the hydrolytic enzymes are missing from the lysosomes of many cell types.

• mis-sorting has been traced to a defective or missing GlcNAc phosphotransferase.

TLS Online TPP Program

#Id: 8225

#XL - Q Biochemistry

Hurler’s disease- mutation in a structural gene that codes for an individual lysosomal hydrolase.

TLS Online TPP Program

#Id: 8224

#XL - Q Biochemistry

Lysosomal storage diseases:

• Hurler’s disease

• Inclusion-cell disease