BIOLOGY STAAR REVIEW 2022

Front

What is peristalsis?

Back

Peristalsis is the involuntary movement of food through the digestive tract, facilitated by the muscular system.

Front

What role do saprophytes play in the ecosystem?

Back

Saprophytes are fungi that feed on dead and decomposing organisms, returning organic material to the soil for use by living organisms.

Front

What factors can denature an enzyme?

Back

An increase in temperature, an increase in pH, or a decrease in pH can denature an enzyme from its optimal conditions.

Front

What is the complementary base pair for the DNA sequence 3' TAC AAT GGC TTA TTT ATC 5'?

Back

The complementary base pair is 5' ATG TTA CCG AAC AAA TAG 3'.

Front

What is the function of enzymes in biological processes?

Back

Enzymes act as catalysts to speed up chemical reactions in biological processes without being consumed.

Front

Define autotrophs.

Back

Autotrophs are organisms that produce their own food from inorganic substances, typically through photosynthesis or chemosynthesis.

Front

What is the structure of DNA?

Back

DNA is a double helix composed of two strands of nucleotides, with complementary base pairing between adenine-thymine and guanine-cytosine.

Front

What is the role of the muscular system in digestion?

Back

The muscular system aids in digestion by facilitating peristalsis, the rhythmic contraction of muscles that moves food through the digestive tract.

Front

What is the significance of complementary base pairing in DNA?

Back

Complementary base pairing ensures accurate replication of DNA and proper transcription into RNA.

Front

What are the main components of the digestive system?

Back

The main components of the digestive system include the mouth, esophagus, stomach, small intestine, large intestine, and accessory organs like the liver and pancreas.