Robertsonian translocation

The long arms of two acrocentric chromosomes become joined to a common centromere through a translocation, generating a metacentric chromosome with two long arms and another chromosome with two very short arms. The smaller chromosome is often lost because very small chromosomes do not have enough mass to segregate properly during mitosis and meiosis.

TLS Online TPP Program

#Id: 7737

#Unit 1. Molecules and their Interaction Relevant to Biology

Calculate the number of electrons, protons and neutrons in 1 mole of 16^O^-2 ions.

TLS Online TPP Program

#Id: 7738

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following are true for an element?

(i) Atomic number = number of protons + number of electrons

(ii) Mass number = number of protons + number of neutrons

(iii) Atomic number = number of protons = number of neutrons

(iv) Atomic number = number of protons = number of electrons

(a) (i) and (ii)

(b) (i) and (iii)

(c) (ii) and (iii)

(d) (ii) and (iv)

TLS Online TPP Program

#Id: 7739

#Unit 1. Molecules and their Interaction Relevant to Biology

Atoms are characterised by:

Radius

Ionization energy

Electron affinity

Electronegativity

Metallic character

Oxidation potential

TLS Online TPP Program

#Id: 7740

#Unit 1. Molecules and their Interaction Relevant to Biology

Atomic radii: The atomic radii of an atom depends on its position in the periodic table.

We can never determine the atomic radius of an atom because there is never a zero probability of finding an electron, and thus never a distinct boundary to the atom.

All that we can measure is the distance between two nuclei (internuclear distance).

TLS Online TPP Program

#Id: 7741

#Unit 1. Molecules and their Interaction Relevant to Biology

Atomic radii: The atomic radii of an atom depends on its position in the periodic table.

We can never determine the atomic radius of an atom because there is never a zero probability of finding an electron, and thus never a distinct boundary to the atom.

All that we can measure is the distance between two nuclei (internuclear distance).

TLS Online TPP Program

#Id: 7742

#Unit 1. Molecules and their Interaction Relevant to Biology

Atomic radii: The atomic radii of an atom depends on its position in the periodic table.

We can never determine the atomic radius of an atom because there is never a zero probability of finding an electron, and thus never a distinct boundary to the atom.

All that we can measure is the distance between two nuclei (internuclear distance).