Random exam questions

Question 1

What do error bars on graphs show?

Answer 1

How variable the data is

Question 2

What is the correct order of increasing size for the following biological structures?
I. The width of a virus
II. The width of a bacterium
III. The thickness of a cell surface membrane
IV. The diameter of a eukaryotic cell

Answer 2

III → I → II → IV

Question 3

Which of the following structures are present in both plant and animal cells?
I. Cell wall
II. Chloroplast
III. Mitochondrion

Answer 3

III only

Question 4

In viewing an electron micrograph of a cell, ribosomes, pili and a single circular chromosome are observed. What other structure is likely to be present?

Answer 4

A plasmid

Question 5

Which of the following is a feature of exocytosis but not endocytosis?
A. Shape changes of a membrane
B. Vesicle formation
C. Use of ATP
D. Secretion

Answer 5

Secretion

Question 6

If mRNA has a codon CAU, what is the corresponding anticodon on the tRNA molecule?

Answer 6

GUA

Question 7

Humans can respire aerobically and anaerobically. Which are products of both aerobic cell respiration
and anaerobic cell respiration in humans?
A. Pyruvate and ATP
B. Pyruvate and lactate
C. ATP and carbon dioxide
D. Lactate and carbon dioxide

Answer 7

Pyruvate and ATP

Question 8

If the amount of DNA in a haploid gamete is represented by ×, what is the net quantity of DNA in a cell from the same organism at the start of meiosis?

Answer 8

4 ×