Exam 1: Introduction to the Study of Cell and Molecular Biology

Which of these cell types does NOT possess membrane-bound organelles?

Among the most complex viruses are the ________, which are also the most abundant biological entities on Earth. (Select all correct descriptive terms)

Which abilities/characteristics are thought to have been possessed by LECA (last eukaryotic common ancestor)but NOT by FECA (first eukaryotic common ancestor)? (Select all correct choices)

The supergroup containing plants is __________________.

Despite being correct about the first two tenets of the Cell Theory, Schleiden and Schwann made an error about another central feature of cells. What was their mistaken claim?

Which organelle is believed to have been acquired by eukaryotic cells most recently?

What major feature distinguishes the theoretical first eukaryotic common ancestor (FECA)from prokaryotes?

Cyanobacteria are capable of photosynthesis, but many of them also convert nitrogen gas into reduced forms of nitrogen (such as ammonia)that can be used by cells in the synthesis of nitrogen-containing organic compounds, including amino acids and nucleotides. This process is called ______.

Prokaryotic cells have been identified in rock dated at ____________

A high powered microscope that allows cellular organelles to be examined in great detail is called ___________.

Viruses like adenovirus, which causes respiratory infections in mammals, have a 20-sided polyhedral capsid. What is this polyhedral shape called?

Which statement is NOT correct when describing eukaryotic and bacterial flagella?

Archaea are found in environments with which characteristics?

Given that cells possess genes from a variety of different ancestral sources, deciding which to use for evolutionary relatedness comparisons can be complicated. The best candidates for determining phylogenetic relationships tend to be ________________.

Which of the following statements about viruses is NOT true?

The collection of bacteria that live on and within the human body are being isolated, identified and characterized; they are referred to as the human ______. It has been demonstrated that these organisms differ based upon the age, diet, geography and state of health of the human from which they were obtained.

Outside of a living cell, the virus exists as a particle called ________, which is little more than a macromolecular package.

What is thought to explain why Preaxostyla is a eukaryote without mitochondria?

What advantageous uses have viruses been shown to have?

The field of biological research in which biologists are attempting to create a living cell in the laboratory, essentially from scratch is known as __________. More modestly, this branch of biology also has a goal of developing novel life forms, beginning with existing organisms, that have a unique value in medicine, industry or in cleaning up the environment.