What are proteasomes quizlet?

What are proteasomes quizlet?

Proteasomes. Organelles that contain an assortment of protein-digesting enzymes, or proteases . Responsible for removing and recycling damaged or denatured proteins and for breaking down abnormal proteins. Cytoplasmic enzymes. attach chains of ubiquitin, (tag) to proteins destined for recycling.

What are chromatids quizlet?

Chromatids. two identical chromosomes that split and contain the same genetic material.

What is an inducer biology quizlet?

In molecular biology, an inducer is a molecule that regulates gene expression. An inducer can bind to protein repressors or activators. In the case of negative control, the genes in the operon are expressed unless they are switched off by a repressor protein.

What are the functions of proteasomes?

The primary function of the proteasome is to degrade proteins (1). Proteasome substrates include signaling molecules, tumor suppressors, cell-cycle regulators, transcription factors, inhibitory molecules (whose degradation activate other proteins), and anti-apoptotic proteins (e.g., Bcl-2), among others (1).

What general role do proteasomes play in the cell?

The proteasome is a multisubunit enzyme complex that plays a central role in the regulation of proteins that control cell-cycle progression and apoptosis, and has therefore become an important target for anticancer therapy.

What’s the difference between chromatids and chromosomes?

A chromosome is a genetic material that has all the features and characteristics of an organism. Now, a chromosome is made up of two strands which are identical to each other and these are called Chromatids. …

How many copies of chromosome 21 would be in the resulting zygote?

If the resulting egg with 2 copies of chromosome 21 is fertilized with a normal sperm, the resulting zygote with be trisomy 21. Mothers in their 40’s are much more likely to have a child with Down’s syndrome than younger mothers.

Does DNA have one or two strands?

So each DNA molecule is made up of two strands, and there are four nucleotides present in DNA: A, C, T, and G. And each of the nucleotides on one side of the strand pairs with a specific nucleotide on the other side of the strand, and this makes up the double helix.

What do inducers bind?

Inducers bind to repressors, causing them to change shape and preventing them from binding to DNA. Therefore, they allow transcription, and thus gene expression, to take place.

What does an inducer bind to quizlet?

In general, an inducer: A: binds to the promoter and prevents the repressor from binding to the operator.