Exam 4: Cellular Aging

One exciting new area of research where the concept of replicative senescence has the potential for offering significant value is the interface between:

Of the cell structures listed below,which,in general,is/are the most vulnerable to damage by oxygen-centered radicals?

Which mechanism is considered the primary cause in the accumulation of damaged cellular proteins?

In total numbers,the majority of human cells are:

Mitotic somatic cells taken from aged individuals can often show robust population doubling rates.

The loss of molecular fidelity most closely supports which theory of aging?

G₁,S,and G₂ are collectively known as the M phase.

The possible lack of sufficient DNA to initiate the final RNA primer on the lagging strand template is generally referred to as the ______.

Cells that enter G₀ are metabolically active but reproductively silent.

The maximum number of population doublings in a cell culture is known as the ______ limit.

If a cell does not receive a mitogenic signal at the correct time,it dismantles the cell cycle control mechanisms and enters:

The phase in which cell separation occurs during cell division is called:

The ______ law of thermodynamics applies to the conversion of energy from one form to another;energy is neither created nor destroyed.

______ is the final acceptor of electrons in the electron transfer system.

A contractile ring composed of ______ and ______ forms at the center of the furrow that begins the separation of the two newly formed cells.

Cell lines are immortal cell cultures.

Fill in the blanks: DNA replication moves in both directions from the replication origins,creating the ______ and ______ strands.