VCE Biology Question Thread

[Calebark]

For this question would it be c
A cell divides to produce gametes. This process will:
A supply cells to replace damaged tissues
B involve only one division of the nucleus
C produce haploid cells
D produce cells that are genetically identical

Correct, good job. As you've identified this is meiosis, which produces four haploid cells as opposed to mitosis which produces two diploid cells.

[biology1234]

Hey guys, Would anyone be able to help me out with this question regarding unit 1 and 2 Biology


Question 20
If a diabetic accidentally injected himself with an overdose of insulin, the most likely outcome would be:

A.   a serious infection in the pancreas
B.   an increase in the production and release of glucose molecules from liver cells
C.   an accumulation of glycogen molecules in the bloodstream
D.   a dangerous decrease in blood glucose levels

[Sine]

Hey guys, Would anyone be able to help me out with this question regarding unit 1 and 2 Biology


Question 20
If a diabetic accidentally injected himself with an overdose of insulin, the most likely outcome would be:

A.   a serious infection in the pancreas
B.   an increase in the production and release of glucose molecules from liver cells
C.   an accumulation of glycogen molecules in the bloodstream
D.   a dangerous decrease in blood glucose levels

What does insulin do?

If you know this you should be able to work out which is most likely in an overdose.

[biology1234]

would it be b

[tiredandstressed]

would it be b

Not quite, insulin decreases blood glucose levels by signalling the liver to uptake glucose and store it as glycogen.
So if you have too much insulin you would have a significant decrease in glucose, not an increase.
Now, what do you think the answer might be?

[Sine]

would it be b

What is your reasoning behind b?

[biology1234]

Large hydrophilic molecules cannot easily cross a plasma membrane due to the presence of which one of the following molecules in the membrane.

A. proteins
B. cholesterol
C. glycoproteins
D. phospholipids

[biology1234]

The main component of a plasma membrane
A. protein
B. carbohydrate
C. lipid
D. cholesterol

[PhoenixxFire]

^We need some indication of you having attempted the question please. have you ruled out any options? What are you stuck on?

wouldn't this be the chromatid not chromosome

They're sister chromatids but the whole thing is still a chromosome.
Don't worry about it it's not assessable for 3/4

[biology1234]

Hey guys, Was wondering if you guys could help me with this question. Would it be C

[-Lilac-]

Large hydrophilic molecules cannot easily cross a plasma membrane due to the presence of which one of the following molecules in the membrane.

A. proteins
B. cholesterol
C. glycoproteins
D. phospholipids

Hydrophilic molecules are 'water-loving,' so is there anything in the answer options that is present in the plasma membrane and has a 'water hating' (hydrophobic) component that would not allow such a molecule to pass? Think about what the plasma membrane is composed of.

The main component of a plasma membrane
A. protein
B. carbohydrate
C. lipid
D. cholesterol

Again, it would be good to search up a diagram of the plasma membrane and take a look at all its components to answer this one.

Hey guys, Was wondering if you guys could help me with this question. Would it be C

Good job, C is correct! Here the concept being tested is osmosis, and the water will want to move from a low concentration to a high concentration of solute. As the cell has been placed in a hypertonic solution (more solute/sucrose on the outside), the water moves out of the cell and it shrinks.

[Sine]

Reminder for anyone asking a question to outline your own thinking along with the question

This is mainly because actually understanding why you got something wrong/right is more important than just getting the answer. It also gives volunteers the opportunity to give more targeted feedback to help you.

[Chocolatepistachio]

Natural killer cells produce interferon gamma. Interferon gamma is released from the cells and binds to receptors on the same natural killer cells. This activates a signal transduction pathway resulting in the death of the natural killer cells. What form of cell signaling does this involve?
A juxtacrine signaling
B paracrine signaling
C autocrine signaling
D endocrine signaling

Would this be c

[Sine]

Natural killer cells produce interferon gamma. Interferon gamma is released from the cells and binds to receptors on the same natural killer cells. This activates a signal transduction pathway resulting in the death of the natural killer cells. What form of cell signaling does this involve?
A juxtacrine signaling
B paracrine signaling
C autocrine signaling
D endocrine signaling

Would this be c

What part of the stem makes you think it is C?

[Chocolatepistachio]

They are released from the cell and bind to receptors on the same cell