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  • Question 1 - What is the main biochemical buffer in urine? ...

    Correct

    • What is the main biochemical buffer in urine?

      Your Answer: Phosphate

      Explanation:

      Phosphate and ammonia are the major urinary buffers

    • This question is part of the following fields:

      • Biochemistry
      4.3
      Seconds

  • Question 2 - With regard to the cell cycle. In what phase do chromatids get cleaved...

    Correct

    • With regard to the cell cycle. In what phase do chromatids get cleaved into chromosomes and pulled apart?

      Your Answer: Anaphase

      Explanation:

      Mitosis is the process during which cell division occurs. It is divided into 4 stages:
      – The first stage is the prophase during which the chromosomes condense, mitotic spindles form and the chromosomes pair which each other.
      – The second stage is the metaphase during which the chromatids align at the equatorial plane.
      – The third stage is the anaphase during which the chromatids are separated into 2 daughter chromosomes.
      – The fourth phase is the telophase during which the chromatids decondense and a new nuclear envelop forms around the each of the daughter chromosomes. Cytokinesis is the process during which the cell cytoplasm divides.

    • This question is part of the following fields:

      • Biochemistry
      22.7
      Seconds

  • Question 3 - What is the main biochemical buffer in blood? ...

    Correct

    • What is the main biochemical buffer in blood?

      Your Answer: Bicarbonate

      Explanation:

      Bicarbonate serves as the main buffer in the blood. Other than this phosphate, ammonia and haemoglobin also act as buffers to some extent.

    • This question is part of the following fields:

      • Biochemistry
      5.9
      Seconds

  • Question 4 - A 28 year old women is seen in the early pregnancy unit. She...

    Correct

    • A 28 year old women is seen in the early pregnancy unit. She has had a positive pregnancy test but is uncertain of her LMP. Ultrasound doesn't visualise a pregnancy. You perform bHCG tests 48 hours apart. The first bHCG is 400mIU/ml. The second is 190mIU/ml. What is the likely diagnosis

      Your Answer: Non-viable pregnancy

      Explanation:

      B-HCG levels almost double every 48 hours. A B-HCG levels of less than 5 mIU/ml is considered negative and anything above 25 is considered positive. As the foetus was not visualized on ultrasound in the uterus, there is possibility that this might be an ectopic pregnancy. But since the B-HCG levels also continued to fall the pregnancy becomes non-viable.

    • This question is part of the following fields:

      • Biochemistry
      12.9
      Seconds

  • Question 5 - Fibrinogen is activated by which of the following? ...

    Incorrect

    • Fibrinogen is activated by which of the following?

      Your Answer: Tissue Factor

      Correct Answer: Thrombin

      Explanation:

      Fibrinogen is activated by thrombin which converts it into fibrin which forms a mesh to trap red blood cells and form a clot.

    • This question is part of the following fields:

      • Biochemistry
      6.2
      Seconds

  • Question 6 - Which of the following factors shifts the oxygen dissociation curve to the right?...

    Correct

    • Which of the following factors shifts the oxygen dissociation curve to the right?

      Your Answer: Increased [H+]

      Explanation:

      The following shift the oxygen dissociation curve to the right: Increased temperature Increased H+ (i.e. acidosis) Increased 2,3 DPG Increased pCO2 The following shift the oxygen dissociation curve to the left: Increasing pCO shifts the curve to the left Decreased temperature Decreased [H+] (alkalosis) Decreased 2,3 DPG The Oxygen Dissociation Curve for fetal haemoglobin lies to the left of the normal adult Oxygen Dissociation Curve as it has a higher affinity for Oxygen.

    • This question is part of the following fields:

      • Biochemistry
      13.9
      Seconds

  • Question 7 - What is the main biochemical buffer in blood? ...

    Correct

    • What is the main biochemical buffer in blood?

      Your Answer: Bicarbonate

      Explanation:

      Bicarbonate is the main buffer in blood.

    • This question is part of the following fields:

      • Biochemistry
      5.2
      Seconds

  • Question 8 - A 22 year old woman miscarries at 6 weeks gestation. At checkup, she...

    Correct

    • A 22 year old woman miscarries at 6 weeks gestation. At checkup, she shows no obvious signs of complication. What would you advise regarding further pregnancy testing?

      Your Answer: Urine pregnancy test in 3 weeks

      Explanation:

      In the management of a miscarriage, after the completion of 7-14 days of expectant management, the woman is advised to take a pregnancy test after 3 weeks. In case of a positive result she is to return for further care.

    • This question is part of the following fields:

      • Biochemistry
      7.3
      Seconds

  • Question 9 - With regard to the cell cycle. In what phase do chromatids get cleaved...

    Correct

    • With regard to the cell cycle. In what phase do chromatids get cleaved into chromosomes and pulled apart?

      Your Answer: Anaphase

      Explanation:

      G0 is a resting phase. Interphase (G1,S,G2) is where the cell grows and DNA replication occurs forming chromatids. Mitosis is where cell division occurs and this happens in a the following phases: Prophase Chromatin condenses to chromosomes (paired as chromatids). Mitotic spindle forms Metaphase Chromatids align at the equatorial plane AKA the metaphase plate Anaphase Chromatids pulled apart into 2 constituent daughter chromosomes Telophase New nuclear envelopes form around each daughter chromosome Cytokinesis Cells divide Diagram illustrating Mitosis Image sourced from Wikipedia

    • This question is part of the following fields:

      • Biochemistry
      5
      Seconds

  • Question 10 - With regard to the cell cycle. In which part of the cycle does...

    Incorrect

    • With regard to the cell cycle. In which part of the cycle does DNA replication occur?

      Your Answer: Telophase

      Correct Answer: Interphase

      Explanation:

      DNA replication occurs during S phase but that isn’t one of the options. Remember Interphase comprises G1,S and G2 phases!

    • This question is part of the following fields:

      • Biochemistry
      26.7
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Biochemistry (8/10) 80%
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