All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.

Correct Option: C

All metals except Mercury are solid at room temperature. Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine.

Copper is involved in normalized function of many enzymes, such as cytochrome c oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.

Correct Option: A

Copper is involved in normalized function of many enzymes, such as cytochrome c oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.

Aorta is the largest blood vessel in human body. It is the largest of the systemic circulation arteries. Blood enters the aorta from the left ventricle of the heart by way of a one-way valve to prevent backflow. From the aorta, several arterial branches carry oxygenated blood to all tissues in the body.

Correct Option: B

Aorta is the largest blood vessel in human body. It is the largest of the systemic circulation arteries. Blood enters the aorta from the left ventricle of the heart by way of a one-way valve to prevent backflow. From the aorta, several arterial branches carry oxygenated blood to all tissues in the body.

Haemophilia is a group of hereditary genetic disorders that impairs the body’s ability to control blood clotting, which is used to stop bleeding when a blood vessel is broken. It is a sex-linked recessive disorder which is more likely to occur in males than females.

Correct Option: A

Haemophilia is a group of hereditary genetic disorders that impairs the body’s ability to control blood clotting, which is used to stop bleeding when a blood vessel is broken. It is a sex-linked recessive disorder which is more likely to occur in males than females.

The operon is defined as a group of genes whose activity is coordinated by a DNA site. An operon is a functioning unit of genomic DNA containing a cluster of genes under the control of a single promoter. The genes are transcribed together into an mRNA strand and either translated together in the cytoplasm, or undergo trans-splicing to create monocistronic mRNAs that are translated separately.

Correct Option: A

The operon is defined as a group of genes whose activity is coordinated by a DNA site. An operon is a functioning unit of genomic DNA containing a cluster of genes under the control of a single promoter. The genes are transcribed together into an mRNA strand and either translated together in the cytoplasm, or undergo trans-splicing to create monocistronic mRNAs that are translated separately.