which enzyme(s) are needed to make a brown pigment from tyrosine? a. TYRP2 and tyrosinase b....
Homework Answers
Option b is correct
In melanogenesis,in which brown pigment, melanin a brown pigment obtained from tysine, tyrosinase expression is upregulated. The activity of tyrosinase is enthused by α-MSH tviathe cAMP pathway. α-MSH binds to MC1R (melanocortin-1 receptor) on the cell surface and activates adenylate cyclase, which leads to an high level of intracellular cAMP. The expression of tyrosinase, TYRP1 and TYRP2 is induced by cAMP. The regulation of TRYP1, 2 genes by cAMP occurs by the direct involvement of MITF. A 20-bp segment (positions −1861 to −1842) known as the tyrosinase distal element (TDE) within the 5′-flanking enhancer element of the human tyrosinase gene is responsible for pigment cell-specific transcription of TRYP1 and -2. MITF binds the M-box (AGTCATGTGCT) located in the TDEs of TYRP1 and -2 and regulates their expression.
Add Answer to:
which enzyme(s) are needed to make a brown pigment from tyrosine?
a. TYRP2 and tyrosinase
b....
which enzymes are needed to make a black pigment from tyrosine? a. TYRP2 b. Tyrosinase and...
which enzymes are needed to make a black pigment from tyrosine? a. TYRP2 b. Tyrosinase and TYRP1 and TYRP2 c. TYRP1 and Tyrosinase d. TYRP2 and TYRP1
B. Albinism Most humans (and vertebrates, in general) are genetically "programmed" to produce a brown skin...
B. Albinism Most humans (and vertebrates, in general) are genetically "programmed" to produce a brown skin pigment known as melanin. Albinism, the inability to produce melanin, is inherited in humans as an autosomal recessive trait. An individual with genotype AA or Aa will have normally pigmented skin, whereas an individual with genotype aa will produce no melanin. The albino's skin is very pale white. The white color occurs because one or more steps in the biosynthetic pathway for melanin do...
in labrador retrievers, black hair pigment (b) is dominant to brown hair pigment (b); e allows...
in labrador retrievers, black hair pigment (b) is dominant to brown hair pigment (b); e allows pigment to be deposited in the hairs, while ee individuals deposit no pigment in their hair and appear yellow. if two black labs mate and their litter includes black, brown, and yellow puppies, what are the genotypes of the two black labs? Draw a punnett square showing the gametes possible from these black labs andthe genotypes expected in their offsprings. Assume independent assortment for...
Laborador retrievers come in 3 colors-black, brown or golden. Gene B determines what color of pigment...
Laborador retrievers come in 3 colors-black, brown or golden. Gene B determines what color of pigment is produced, with black being dominant over brown. Gene C determines pigment deposition, with the prescense of the dominant allele resulting in pigment deposition and homozygous recessive resulting in a golden appearance (no deposition). a) which gene is epistatic to which? b) If a Bbcc individual is crossed with a bbCc, what proportion of the progeny will be black, brown of golden? c) you...
Albino rabbits lack pigment and are homozygous for the recessive allele c (C allows pigment formation)....
Albino rabbits lack pigment and are homozygous for the recessive allele c (C allows pigment formation). Rabbits homozygous for the recessive allele b make brown pigment, while those with at least one copy of B make black pigment. True-breeding brown rabbits were crossed to albino rabbits (that also had the genotype BB). The F1 rabbits, which were all black, were crossed to rabbits with a double recessive genotype (bb cc). The progeny obtained were 34 black, 66 brown, and 100...
6) Which of the following is NOT a correct association of amphibian pigment cells? A) Melanophores-brown...
6) Which of the following is NOT a correct association of amphibian pigment cells? A) Melanophores-brown or black pigment B) Xanthophores orange, yellow, and red pigment C) Chromatophores on the top of the epidermis D) Iridophores-silvery light-reflecting pigment E) All of the choices are correct associations 7) Which is true regarding frog skin? A) The dermis contains chromatophores, which provide skin color. B) The epidermis has mucous glands that secrete mucus to waterproof the skin. C) The epidermis contains keratin....
Albino rabbits (lacking pigment) are homozygous for the recessive c allele (C allows pigment formation). Rabbits...
Albino rabbits (lacking pigment) are homozygous for the recessive c allele (C allows pigment formation). Rabbits homozygous for the recessive b allele make brown pigment, while those with at least one copy of B make black pigment. True-breeding black rabbits were crossed to albinos. F1 rabbits, which were all black, were crossed to the double recessive (bb cc). The progeny obtained were 40 black, 60 brown, and 100 albino. What phenotypic proportions would have been expected if the b and...
(L)-Tyrosine is a nonessential amino acid that is synthesized in the body from phenylalanine. As a...
(L)-Tyrosine is a nonessential amino acid that is synthesized in the body from phenylalanine. As a building block for several important brain chemicals, tyrosine is required to make epinephrine, norepinephrine, serotonin, and dopamine, all of which work to regulate mood. Therefore, deficiencies in tyrosine have been associated with depression. In addition, tyrosine aids in the production of melanin (pigment responsible for hair and skin color) and in the function of organs in the body responsible for making and regulating hormones,...
A mutant plant with white flowers exists that lacks red anthocyanin pigment, normally made by enzyme...
A mutant plant with white flowers exists that lacks red anthocyanin pigment, normally made by enzyme P. Indeed the petal tissue lacks all detectable activity for enzyme P. Despite the lack of enzyme activity, a study of homozygous mutant cells using antibodies against the wild-type enzyme demonstrated that the cells homozygous for the mutation still had the enzyme (i.e., the antibody showed the presence of the enzyme). Which statement below could most likely explain these results? A )The mutant had...
Which of the following are NOT TRUE about tyrosine kinase-associated receptors? a. they bind to tyrosine...
Which of the following are NOT TRUE about tyrosine kinase-associated receptors? a. they bind to tyrosine kinases b. the alpha interferon receptor is an example of a tyrosine kinase-associated receptor. c. ligand binding results in phosphorylation of the cytoplasmic tails of the receptors on tyrosines d. they have tyrosine kinase domains
B. Albinism Most humans (and vertebrates, in general) are genetically "programmed" to produce a brown skin pigment known as melanin. Albinism, the inability to produce melanin, is inherited in humans as an autosomal recessive trait. An individual with genotype AA or Aa will have normally pigmented skin, whereas an individual with genotype aa will produce no melanin. The albino's skin is very pale white. The white color occurs because one or more steps in the biosynthetic pathway for melanin do...
6) Which of the following is NOT a correct association of amphibian pigment cells? A) Melanophores-brown or black pigment B) Xanthophores orange, yellow, and red pigment C) Chromatophores on the top of the epidermis D) Iridophores-silvery light-reflecting pigment E) All of the choices are correct associations 7) Which is true regarding frog skin? A) The dermis contains chromatophores, which provide skin color. B) The epidermis has mucous glands that secrete mucus to waterproof the skin. C) The epidermis contains keratin....
(L)-Tyrosine is a nonessential amino acid that is synthesized in the body from phenylalanine. As a building block for several important brain chemicals, tyrosine is required to make epinephrine, norepinephrine, serotonin, and dopamine, all of which work to regulate mood. Therefore, deficiencies in tyrosine have been associated with depression. In addition, tyrosine aids in the production of melanin (pigment responsible for hair and skin color) and in the function of organs in the body responsible for making and regulating hormones,...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago