Question of the Day III

Question 1

What are one of the few veins which carry oxygenated blood?

Answer 1

Pulmonary veins and umbilical veins

Question 2

DNA Topoisomerase is a protein which

Answer 2

Relaxes supercoiling

Question 3

What protein unwinds the double helix of the DNA by breaking the hydrogen bonds

Answer 3

Helicase

Question 4

What protein removes and replaces the RNA primer with DNA

Answer 4

DNA Polymerase I

Question 5

What does DNA Ligase do?

Answer 5

Joins DNA segments together, as seen with Okazaki fragments

Question 6

Bacteria do not undergo

Answer 6

Meiosis and Sexual Reproduction

Question 7

What is transformation?

Answer 7

Picking up free DNA from other dead bacteria

Question 8

What is conjugation?

Answer 8

The transfer of DNA from one cell to another via pilus

Question 9

What is transduction?

Answer 9

The use of bacteriophages (viruses) to transfer DNA from one bacteria to another via infection

Question 10

What does the endosymbiotic theory explain?

Answer 10

How mitochondria and chloroplasts are found in eukaryotic cells

Question 11

What is a component of the bacterial cell wall?

Answer 11

Peptidoglycan

Question 12

Plant cell walls are composed of

Answer 12

Cellulose

Question 13

Fungi cell walls are made of

Answer 13

Chitin

Question 14

How much ATP in the TCA cycle?

Answer 14

• 2 ATP are produced under substrate-level phosphorylation
• 18 ATP are produced under oxidative phosphorylation (with 6 NADH)
• 4 ATP are produced from oxidative phosphorylation (with 2 FADH2)

Question 15

Alpha cells secrete

Answer 15

Glucagon (raise the concentration of glucose and fatty acids in the bloodstream)

Question 16

The liver secretes

Answer 16

Angiotensinogen (hormone system that regulates blood pressure and fluid balance)

Question 17

The hypothalmus secretes

Answer 17

GnRH and TRH

Question 18

Oxytocin is secreted by the

Answer 18

posterior pituitary

Question 19

What is Tidal Volume

Answer 19

The air one inhales and exhales at a default, steady pace at rest

Question 20

Which muscles possess striations (series of ridges, furrows or linear marks)

Answer 20

Skeletal + Cardiac

Question 21

A female has 45 chromosomes, possessing only one X chromosome. She is sterile with no tangible ovaries. What condition does she possess?

Answer 21

Turner syndrome

Question 22

Spermatogenesis occurs in which of the following?

Answer 22

Vas Deferens

Question 23

The mesoderm gives rise to

Answer 23

Muscle, Bone, and Connective Tissue

Question 24

Cuboidal epithelial tissues can be found in walls of

Answer 24

Tubules

Question 25

The alveolus in lungs is an example of what type of what type of tissue?

Answer 25

Simple squamous epithelial tissue