Alzheimer disease is an irreversible, progressive disorder in which brain cells (neurons) deteriorate, resulting in the loss of cognitive functions, primarily memory, judgment and reasoning, movement coordination and pattern recognition. It leads to nerve cell death and tissue loss throughout the brain.

Correct Option: D

Alzheimer disease is an irreversible, progressive disorder in which brain cells (neurons) deteriorate, resulting in the loss of cognitive functions, primarily memory, judgment and reasoning, movement coordination and pattern recognition. It leads to nerve cell death and tissue loss throughout the brain.

When a DNA solution is heated enough, the doublestranded DNA unwinds, and the Hydrogen bonds that hold the two strands together weaken and finally break. The process of breaking a double-stranded DNA into single strands is known as DNA denaturation, or DNA melting. The hyperchromicity of DNA occurs when the DNA duplex is denatured.

Correct Option: A

When a DNA solution is heated enough, the doublestranded DNA unwinds, and the Hydrogen bonds that hold the two strands together weaken and finally break. The process of breaking a double-stranded DNA into single strands is known as DNA denaturation, or DNA melting. The hyperchromicity of DNA occurs when the DNA duplex is denatured.

An Air Quality Index(AQI) of 301-500 is considered as hazardous to human health. It denotes the severely polluted state of air. AQI values over 300 trigger health warnings of emergency conditions. The entire population is even more likely to be affected by serious health effects.

Correct Option: A

An Air Quality Index(AQI) of 301-500 is considered as hazardous to human health. It denotes the severely polluted state of air. AQI values over 300 trigger health warnings of emergency conditions. The entire population is even more likely to be affected by serious health effects.

The Sartorius muscle is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment. Its upper portion forms the lateral border of the femoral triangle.

Correct Option: A

The Sartorius muscle is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment. Its upper portion forms the lateral border of the femoral triangle.

Lactose is the sugar found in milk. It is a combination of glucose and another small sugar called galactose. It is a form of double sugar. Lactose makes up around 2–8% of milk (by weight).

Correct Option: D

Lactose is the sugar found in milk. It is a combination of glucose and another small sugar called galactose. It is a form of double sugar. Lactose makes up around 2–8% of milk (by weight).