__________ are a group of complex cells that have a nucleus and many other organelles.?

Question

_________________ are a group of complex cells that have a nucleus and many other organelles.

A Bacteria cells

B Blue-green bacteria cells

C Prokaryote cells

D Eukaryote cells

Answer 1

In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, kernel) is a membrane-enclosed organelle found in most eukaryotic cells. It contains most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins such as histones to form chromosomes. The genes within these chromosomes make up the cell's nuclear genome. The function of the nucleus is to maintain the integrity of these genes and to control the activities of the cell by regulating gene expression.

Gene expression involves two major processes, the first of which is transcription, in which DNA is used as a template to produce RNA. When this RNA encodes proteins, it is referred to as messenger RNA (mRNA). The second process is called translation, and involves mRNA being used as a template to produce proteins. Only transcription occurs inside the nucleus, meaning that all mRNA must be exported to the cytoplasm before it can be translated.

The main structural elements of the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle, and the nuclear lamina, a meshwork on the nuclear face of the envelope that adds mechanical support. Because the membranes are impermeable to most molecules, nuclear pores are required to allow movement across the envelope. These pores cross the entire envelope, providing a channel that allows free movement of small solutes. The movement of larger molecules is controlled, and requires active transport, facilitated by carrier proteins. Nuclear transport is of paramount importance to cell function, as movement through the pores is required for both gene expression and chromosomal maintenance.

Although the interior of the nucleus does not contain any membrane-delineated bodies, its contents are not uniform, and a number of subnuclear bodies exist, made up of unique proteins, RNA molecules, and DNA conglomerates. The best known of these is the nucleolus, which is mainly involved in assembly of ribosomes. After being produced in the nucleolus, ribosomes are exported to the cytoplasm where they translate mRNA.

The nucleus was the first organelle to be discovered, and was first described by Franz Bauer in 1802.[1] It was later popularized by Scottish botanist Robert Brown in 1831. Brown was studying orchids microscopically when he observed an opaque area, which he called the areola or nucleus, in the cells of the flower's outer

Answer 2

D) Eukaryote cells are complex and contain a nucleus and other membrane bound organelles.

The other choices are all the same thing. A) and B) are both C).

Way to copy/paste there IrishGirl! The least you can do is acknowledge a source (I'm guessing Wikipedia).

Answer 3

D is your best choice but not totally correct, the word "group" means it should be either a colony or multi-cellular organism of eukaryotic cells

Answer 4

eukaryotes are the only ones on that list with nuclei and many types of organelles.

Answer 5

eukaryote cell

Answer 6

eukaryotes, eu meaning true and karyo meaning cell.

Answer 7

D