Exam 6: Overview of Cell Biology

What is any chemical reaction in which atoms lose electrons called?

Which of the following are compounds called purines? 1)Adenine and cytosine 2)Adenine and guanine 3)Adenine and thymine

During mitosis,which phase of the cellular life cycle is the actual DNA synthesis period?

What do the highly organized enzymes in the inner membranes of the mitochondria break down? 1)Carbohydrates 2)Fats 3)Proteins

Which of the following are major tasks of the cytoplasm? 1)Accepts and builds up unrefined materials and assembles from these materials new substances such as carbohydrates,lipids,and proteins. 2)Breaks down organic materials to produce energy. 3)Packages substances for distribution to other areas of the cell or to various sites in the body through the circulation. 4)Eliminates waste products.

Adenine bonds only with

The cell components that contain the centrioles are the

The much smaller structures that make up nucleic acids are called

What is a highly coiled strand that is one of two duplicated portions of DNA in a replicated chromosome that appears during cell division identified as?

Fraternal twins may also be referred to as

In general,which of the following can human cells do? 1)Move,grow,react,and protect themselves 2)Repair damage and regulate life processes 3)Reproduce

How many different amino acids are involved in protein synthesis in humans?

During what phase of mitosis are the centromeres severed followed by the sister chromatids moving apart and are then subsequently pulled toward opposite poles of the mitotic spindle?

Inorganic materials are compounds that

Which of the following serves as a prototype for messenger RNA (mRNA)?

The steps,or rungs,of the DNA ladder-like structure consist of complementary chemicals that are

Which of the following is/are considered to be acellular tissue?

Antibodies are protein molecules produced by specialized cells in the bone marrow called

A nucleotide is formed from a nitrogen-containing organic base,a ________________ molecule,and a phosphate molecule.

In the human body mineral salts are necessary for 1)proper cell function. 2)creation of energy. 3)conduction of impulses along nerves.