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Question 1
Incorrect
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With regard to the cell cycle. In what phase do chromatids get cleaved into chromosomes and pulled apart?
Your Answer: Telophase
Correct 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
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Question 2
Incorrect
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With regard to the cell cycle. In which part of the cycle does DNA replication occur?
Your Answer:
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!
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This question is part of the following fields:
- Biochemistry
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Question 3
Incorrect
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Which of the following pathology terms refers to programmed cell death?
Your Answer:
Correct Answer: Apoptosis
Explanation:Apoptosis is described as programmed cell death. The cell release certain proapoptotic mediators that regulate this cell death.
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This question is part of the following fields:
- Biochemistry
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Question 4
Incorrect
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Which of the following prolongs Prothrombin time?
Your Answer:
Correct Answer: Factor V deficiency
Explanation:Prothrombin time is increased in:
– Factor V deficiency
– Vitamin K deficiency (which affects factors 2,7 and 10)
– Warfarin therapy
– Severe liver failure
Protein C is an anticoagulant and deficiency results in a hyper-coagulable state with tendency towards thrombosis. -
This question is part of the following fields:
- Biochemistry
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Question 5
Incorrect
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What is the main biochemical buffer in blood?
Your Answer:
Correct 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.
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This question is part of the following fields:
- Biochemistry
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Question 6
Incorrect
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Question 7
Incorrect
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Which of the following factors shifts the oxygen dissociation curve to the right?
Your Answer:
Correct 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.
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This question is part of the following fields:
- Biochemistry
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Question 8
Incorrect
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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:
Correct 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.
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This question is part of the following fields:
- Biochemistry
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Question 9
Incorrect
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Question 10
Incorrect
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With regard to the cell cycle. In what phase do chromatids get cleaved into chromosomes and pulled apart?
Your Answer:
Correct 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
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This question is part of the following fields:
- Biochemistry
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