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
kupik [55]
3 years ago
10

Which of the following statements is FALSE? Which of the following statements is FALSE? Hemoglobin is a tetramer, each of which

binds a heme group. In both hemoglobin and myoglobin, iron is chelated by a tetrapyrole ring system. The iron in both hemoglobin and myoglobin has two coordination sites that bind to oxygen. Myoglobin is a single polypeptide chain folded about a heme prosthetic group.
Biology
1 answer:
Elza [17]3 years ago
8 0

Answer:

The false statement is The iron in both the hemoglobin and myoglobin has two coordination sites that bind to oxygen.

Explanation:

Hemoglobin is an oligomeric,allosteric,conjugated protein with 4 polypeptide chains joined by non covalent bonds that contain heme prosthetic group.It is an iron containing porphyrin derivative present in all vertebrate.

The tetramers of hemoglobin consists of numerous combinations of seven polypeptide chains and each of which is encoded by separate genes.

Myoglobin is a globular protein that consists of single polypeptide chain of 153 amino acid residue and a single heme group.

Globin of Mb binds with single heme group by forming co ordinate bond.The heterocyclic ring system of heme  is a porphyrin derivative.It is made up of 4 pyrrole ring and 4 pyrroles are linked by methine bridges to form a tetrapyrolle ring.

The Fe atom is present either in Fe²⁺ state or Fe³⁺ oxidation state in the center of protoporphyrin IX ring.The iron atom has 6 co ordination bond,4 in the plane of flat porphyrin ring and two perpendicular to it.

You might be interested in
Alex is participating in a 50 meter dash. Predict the most important chemical process his muscles will rely on during this race.
natta225 [31]

Answer: The correct answer to the question is option E

BOTH ANAEROBIC RESPIRATION AND CREATININE PHOSPHATE BREAKDOWN.

Explanation: 50 meter dash is a race,a form of exercise, energy is required as well as muscle contraction and chemical processes.

Alex muscles will rely on the following chemical processes during the race;anaerobic respiration and creatine phosphate breakdown.

These chemical processes are explained below;

Aerobic respiration uses oxygen to generate energy but unlike aerobic respiration, anaerobic respiration breaks down glucose to provide energy and create adenosine triphosphate(ATP), lactic acid and ethanol.

Muscle contraction cannot take place without the supply of energy by ATP, molecules can store energy in it's phosphate form, this molecule is known as creatine phosphate,when this happens,ATP that is in excess will then transfer it's energy to creatine,this action will produce creatinine phosphate and adenosine diphosphate (ADP) and they will now be stored as reserve of energy that can be used to produce more ATP and thus energy is produced.

5 0
3 years ago
As evidenced in the graph, the national average CO concentrations have decreased substantially over the years. All BUT ONE tacti
Gekata [30.6K]

Answer:

Explanation:

Carbon monoxide (CO) is a colourless, non-irritant, odourless and tasteless toxic gas. It is produced by the incomplete combustion of carbonaceous fuels such as wood, petrol, coal, natural gas and kerosene. Its molecular weight is 28.01 g/mol, melting point −205.1 °C, boiling point (at 760 mmHg) −191.5 °C (−312.7 °F), density 1.250 kg/m3 at 0 °C and 1 atm and 1.145 kg/m3 at 25 °C and 1 atm, and relative density (air = 1) 0.967 (1,2). Its solubility in water at 1 atm is 3.54 ml/100 ml at 0 °C, 2.14 ml/100 ml at 25 °C and 1.83 ml/100 ml at 37 °C.

The molecular weight of carbon monoxide is similar to that of air (28.01 vs approximately 29). It mixes freely with air in any proportion and moves with air via bulk transport. It is combustible, may serve as a fuel source and can form explosive mixtures with air. It reacts vigorously with oxygen, acetylene, chlorine, fluorine and nitrous oxide. Carbon monoxide is not detectable by humans either by sight, taste or smell. It is only slightly soluble in water, blood serum and plasma; in the human body, it reacts with haemoglobin to form carboxyhemoglobin (COHb).

The relationship of carbon monoxide exposure and the COHb concentration in blood can be modelled using the differential Coburn-Forster-Kane equation (3), which provides a good approximation to the COHb level at a steady level of inhaled exogenous carbon monoxide.

Conversion factors

At 760 mmHg and 20 °C, 1ppm = 1.165 mg/m3 and 1 mg/m3 = 0.858 ppm; at 25 °C, 1 ppm = 1.145 mg/m3 and 1 mg/m3 = 0.873 ppm.

8 0
3 years ago
Read 2 more answers
10 branches of science first is definition of science
creativ13 [48]

Answer:

ham Bhan k Uthai xeya ta hamra Garmin lagai xa kathi la Kani k bara ma Pharo thanda lagai xai

7 0
1 year ago
Enzymes only work with specific substrates because each substrate
kobusy [5.1K]
<span>it has a specific activation site for enzyme attachment</span>
4 0
3 years ago
How does a habitat impact the survival odds of an organism?
Nimfa-mama [501]

Answer is B

Increase the odds by creating relationships among organisms.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement best describes both dna and rna?
    10·1 answer
  • The Galapagos Islands contain thirteen species of finches. Four are seen here. It is believed that all of these species had one
    7·2 answers
  • 3. The two ends of a strand of DNA are called the
    10·2 answers
  • Your relative is experiencing memory loss related to Alzheimer disease. Research suggests that the decline in memory is due to a
    6·1 answer
  • Where does the extra energy come from in photosynthisis
    9·1 answer
  • How do scientists match a fingerprint to a specific person?
    14·2 answers
  • Homologous recombination can be used in the lab to replace a gene of interest with a selection marker. To confirm that the selec
    10·1 answer
  • Which of the following is not a reason we become shorter as we age?
    8·1 answer
  • Pepsin and Trypsin are enzymes. At what pH do they have the highest rate of reaction?
    10·1 answer
  • The virus known as ________ primarily infects lymphocytes.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!