1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vagabundo [1.1K]
3 years ago
6

Scientists can use mutants to study metabolic pathways. These organisms have a mutation in a gene encoding a metabolic pathway e

nzyme that results in the activation of that enzyme. Saccharomyces cerevisiae (a yeast species) mutants are available that grow on pyruvate or ethanol, but not sugars or glycerol. Which of the following glycolytic enzymes is most likely affected?
1. triose phosphate isomerase

2. aldolase -phophoglucose isomerase (phosphohexose isomerase or glucose-6-phosphate isomerase)

3. hexokinase

4. pyruvate kinase
Biology
1 answer:
lisabon 2012 [21]3 years ago
6 0

Answer:

Pyruvate kinase

Explanation:

Yeasts convert glycerol and sugars into glyceraldehyde 3-phosphate (G3P) through independent pathways. Then, G3P forms pyruvate and, in some circumstances, pyruvate is converted in ethanol, which can be used as energy sources. If the mutation affects any reaction before G3P formation, it will only affect yeast growing either on sugar or pyruvate but not both.

Pyruvate kinase is the only enzyme on the list acting after G3P is formed and before pyruvate is formed. All other options are enzymes acting only in the formation of G3P from sugars. Meaning that only pyruvate kinase mutants will lack the ability to grow on both sugars and glycerol.

You might be interested in
The energy stored in a foot of snow on a steep roof is ..?
ira [324]

Answer:

Potential Energy.Hope it helps ☺️

8 0
3 years ago
Red blood cells have _________ and generate energy ________.
lora16 [44]
Red blood cells have no mitochondria and generate energy anaerobic. So, the answer would be B. You can easily eliminate A. and C. because they mention that blood cells have a mitochondria, but they don’t.
3 0
3 years ago
Many receptor tyrosine kinase pathways have mapk as a downstream signaling component. mapk can phosphorylate target proteins. wh
Lapatulllka [165]

A protein kinase that is specific to the amino acids serine and threonine is known as a mitogen-activated protein kinase (MAPK or MAP kinase; also known as a serine/threonine-specific protein kinase).

<h3>Mitogen-activated protein kinase :</h3>

A small number of cell surface receptors can ultimately generate a large intracellular response due to activation of kinase cascades.

In order to trigger an appropriate physiological response, such as cellular proliferation, differentiation, development, inflammatory reactions, and death in mammalian cells, MAPK pathways relay, amplify, and integrate information from a variety of stimuli.

Tyrosine phosphorylation, specifically numerous tyrosines on each RTK in the dimer, is how cross-linking triggers the tyrosine kinase activity in these RTKs. The term "cross-phosphorylation" refers to this action.

The activation of a MAPKKKK or MAPKKK by stimulation of plasma membrane receptors is the initial stage of signal transduction. The MAPKKK then phosphorylates two serine or threonine residues in the S/T-X5-S/T (X is any amino acid) motif of its activation loop, activating a downstream MAPKK.

Learn more about MAPK here:

brainly.com/question/23449262

SPJ4

3 0
2 years ago
Another term(not an animal) that can be used to describe a 2nd level consumer is ...
alexgriva [62]
Secondary consumer

(In detail) A secondary consumer eats the primary consumers while the primary eats the producers. Primary consumers are herbivores while secondary consumers can be omnivores and carnivores.
6 0
3 years ago
Phoebe observes a group of snowy egrets feeding at several locations near her home. She would like to learn what foods the egret
Umnica [9.8K]
The Egrets seem to prefer insects because they ate 66 of them, and 66 was the most visited as well.
6 0
3 years ago
Read 2 more answers
Other questions:
  • An intestinal hormone that stimulates parietal cells in the stomach is __________. secretin cholecystokinin enterokinase gastrin
    5·1 answer
  • A mating between a male donkey (2n = 62) and a female horse (2n = 64) produces sterile mules. why are mules sterile?
    8·1 answer
  • As part of a community outreach program, you have been selected to organize a nutrition fair for the local community. Which of t
    7·1 answer
  • Maria is a sedentary, 68-year-old woman who is overweight. She complains that her hands and feet are always cold and she tires q
    12·2 answers
  • In the above problem, if pollution causes the tree to darken, tell what will happen to the insect populations over time and how
    9·1 answer
  • This invention made amputation much safer, which cut down on the number of people who died during the procedure
    15·1 answer
  • Which molecules does a cell need from food to make these membrane
    6·1 answer
  • Please help me ur nice...
    14·1 answer
  • Percentages of Nucleotide Differences in Chloroplast Genomes
    5·1 answer
  • Which describes
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!