Question

1. what characterizes the lagging strand during dna replication?

a. it is synthesized continuously
b. it is synthesized in the 5 to 3 direction only
c. it is synthesized in short, discontinuous fragments
d. it does not require okazaki fragments

1. which of the following would be considered an inference rather than an observation?

a. the plant is green because it is healthy
b. the plant has green leaves
c. the plant has a rough texture
d. the plant is 30 cm tall

1. what does the calvin cycle (light-independent reactions) produce that is essential for plant growth?

a. oxygen
b. water
c. glucose
d. carbon dioxide

1. which structure acts as a semi - permeable barrier, protecting the cell and regulating what enters and exits?

a. cytoplasm
b. nucleus
c. cell membrane
d. cytoskeleton

1. what is the primary function of organelles in eukaryotic cells?

a. to provide structural support to the cell
b. to control the movement of substances in and out of the cell
c. to store the cell’s genetic information
d. to perform specialized tasks within the cell

1. what is the complete set of genetic information present in an individual’s dna called?

a. mitochondria
b. chromosomes
c. genome
d. gene

1. what is the function of mitochondria (dna)?

a. encoding genetic information essential for cellular energy production
b. controlling cell division
c. encoding genetic information for protein synthesis
d. controlling cell - membrane structure

Explanation:

Question 1:

During DNA replication, the lagging strand is synthesized in short, discontinuous fragments (Okazaki fragments) because DNA polymerase can only add nucleotides in the 5' to 3' direction, and the lagging strand runs 3' to 5' relative to the replication fork movement. Option a is wrong as both strands are synthesized continuously (leading) or discontinuously (lagging), not the lagging being continuous. Option b: both strands are synthesized 5' to 3', so this isn't unique to lagging. Option d: lagging strand does require Okazaki fragments (and DNA ligase to join them). So the correct option is c.

An inference is a conclusion drawn from observations, while an observation is a direct fact. Option a: "The plant is green because it is healthy" is an inference (reasoning about why it's green), while b (green leaves), c (rough texture), d (30 cm tall) are direct observations. So the correct option is a.

The Calvin Cycle (light - independent reactions) uses CO₂, ATP, and NADPH to produce glucose (a sugar used for plant growth). Oxygen is produced in the light - dependent reactions. Water is a reactant or by - product in other processes. Carbon dioxide is a reactant for the Calvin Cycle. So the correct option is c.

Answer:

c. It is synthesized in short, discontinuous fragments

Question 2: