MSRN Gene

What is the primary function of the myostatin protein?

• To send a message inside a cell

• To build and move muscles

• To produce energy for muscle contractions

• To increase muscle mass

How does myostatin typically affect muscle size in animals?

• It causes muscles to shrink

• It causes muscles to be typical in size

• It has no effect on muscle size

• It increases muscle size significantly

What happens when a myostatin protein is only partially formed?

• It enhances the cell's ability to produce energy

• It does not fit correctly into the receptor, leading to extra-big muscles

• It causes the cell to produce more myostatin

• It fits perfectly into a cell's receptor

Where was the heavily muscled cattle phenotype first discovered?

• Australia

• United States

• Japan

• Belgium

In what year did scientists investigate the heavily muscled phenotype in mice?

• 1970

• 2001

• 1985

• 1997

What was the original name of the myostatin protein?

• MYO1

• ACTN3

• MSTN

• GDF-8

Which animals have been genetically modified to produce partial myostatin proteins?

• Cattle and dogs

• All of the above

• Pigs and rabbits

• Fish and goats

What does the 'myo' part of 'myostatin' mean?

• To keep steady

• Muscles

• Growth

• Protein

What effect does partial myostatin have on animals?

• Extra-big muscles

• Typical muscle size

• Decreased muscle mass

• No change in muscle size

What is the role of receptors in the function of myostatin?

• To decrease muscle mass

• To increase cell size

• To produce more myostatin

• To relay messages from outside to inside the cell