Question

Life Science help!!!

Answer 1

What enzyme is coded for in the chromosome of bacteria?




beta-galactosidase



glucose



lactose



galactose

Answer 2

@jabez177

Answer 3

@Iwillnevertell

Answer 4

A circular bacterial chromosome is a bacterial chromosome in the form of a molecule of circular DNA. Unlike the linear DNA of most eukaryotes, typical bacterial chromosomes are circular.

Most bacterial chromosomes contain a circular DNA molecule – there are no free ends to the DNA. Free ends would otherwise create significant challenges to cells with respect to DNA replication and stability. Cells that do contain chromosomes with DNA ends, or telomeres (most eukaryotes), have acquired elaborate mechanisms to overcome these challenges. However, a circular chromosome can provide other challenges for cells. After replication, the two progeny circular chromosomes can sometimes remain interlinked or tangled, and they must be resolved so that each cell inherits one complete copy of the chromosome during cell division.

Answer 5

@Awolflover1, I'm not so sure...

Answer 6

Hmm anyy clue?

Answer 7

A?

Answer 8

The genes of a bacterium are virtually all on the single circular chromosome. Many studies of genes have been done on E. coli bacteria. One place E. coli lives is in human intestines. Lactose, milk sugar, is a disaccharide that E. coli can use for energy. But first the bacteria must break the lactose down into smaller molecules. The enzyme beta-galactosidase breaks down the lactose into its monosaccharides (simple sugar units)—glucose and galactose. If no lactose is present, the bacterium has little use for the enzyme, so the gene for making it is turned off. If lactose is present, the gene for beta-galactosidase is turned on, resulting in production of the enzyme.

Answer 9

Hm.. So glucose! I think it is!

Answer 10

Okay, I have another question:

If the p53 gene is damaged, what can occur?




tumor growth This one?



lack of oxygen to the brain



no antibodies formed



buildup of lactose

Answer 11

1 question at a time!

Answer 12

Right @KendrickLamar2014

Answer 13

?

Answer 14

What do you mean? We just answered the first one, right?

Answer 15

! question at a time!

Answer 16

That what I meant sorry 1 question at a time! I heard it from a mod! i don't want to break the rule!

Answer 17

Oh... okay, let me post a new thread. I'll tag you.