Following statements are regarding to the centrosome cycle of an animal cell.

A. During G1, the daughter procentrioles continue to elongate.

B. During S phase, daughter procentrioles form adjacent to maternal centrioles so that two pairs of centrioles become visible within the centrosome. 

C. During G2 phase, the centrosome contains a single pair of centrioles.

D. At the beginning of mitosis, the centrosome splits, with each pair of centrioles becoming part of its own centrosome. As they separate, the centrosomes organize the microtubule fibres that make up the mitotic spindle.

Which of the following option is correct? 

#Question id: 720

#Unit 1. Molecules and their Interaction Relevant to Biology

How would a homopolymer of alanine be more likely to form an alpha helix in water or in a hydrophobic medium?

#Question id: 719

#Unit 1. Molecules and their Interaction Relevant to Biology

Suppose that a 40-residue segment of a protein folds into a two-stranded antiparallel β structure with a 4-residue hairpin turn. What is the longest dimension of this motif?

#Question id: 718

#Unit 1. Molecules and their Interaction Relevant to Biology

Poly- L -leucine in an organic solvent such as dioxane is a helical, whereas poly- L isoleucine is not. Why do these amino acids with the same number and kinds of atoms have different helix-forming tendencies?

#Question id: 717

#Unit 1. Molecules and their Interaction Relevant to Biology

What is Φ & Ψ angles for collagen triple helix?

#Question id: 716

#Unit 1. Molecules and their Interaction Relevant to Biology

In beta turns which amino acid is not allowed at i and i+3 position?

#Question id: 715

#Unit 1. Molecules and their Interaction Relevant to Biology

A protein is made up of 200 amino acids with alpha helix region containing 100 amino acid residues and 80 amino acids making antiparallel beta sheet and rest 20 amino acids in extended form. What will be the total length of this protein?