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TLS Online TPP Program

#Question id: 134

Ultraviolet (UV) light can be used to estimate protein solution concentrations because

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. phenylalanine absorbs at 260 nm.

  2. all the amino acids absorb UV light.

  3. aromatic amino acids absorb at 280 nm.

  4. tryptophan and tyrosine absorb at 280 nm.

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TLS Online TPP Program

#Question id: 5580

#Unit 5. Developmental Biology

The innermost layer of the root cortex is the
TLS Online TPP Program

#Question id: 5581

#Unit 5. Developmental Biology

In humans, an individual with an XXY chromosomal complement will develop as
TLS Online TPP Program

#Question id: 5582

#Unit 5. Developmental Biology

Secretion of Müllerian-inhibiting substance by Sertoli cells:
TLS Online TPP Program

#Question id: 5583

#Unit 5. Developmental Biology

In mammals, dosage compensation is carried out by:
TLS Online TPP Program

#Question id: 5584

#Unit 5. Developmental Biology

Which one of the following provides rapid block to polyspermy during sea urchin fertilization?
TLS Online TPP Program

#Question id: 5585

#Unit 5. Developmental Biology

Hermaphrodite is the sexual phenotype of a gain-of-function transformer-1 in both X and XX of C. elegans. Which of the following loss-of-function will also result in hermaphrodite regardless of copy number of X?