Login | Register

Welcome, Guest. Please login or register.

July 12, 2020, 10:35:00 pm

Author Topic: HSC Biology Question Thread  (Read 166622 times)  Share 

0 Members and 1 Guest are viewing this topic.

Coolmate

  • MOTM: SEP 19
  • Forum Obsessive
  • ***
  • Posts: 400
  • 🔥Goodluck w/ HSC Trials Everyone!
  • Respect: +171
Re: HSC Biology Question Thread
« Reply #1380 on: June 04, 2020, 04:36:04 pm »
0
Also for this question I think the answer is b am I correct?

All of the following plant transport processes are directly driven by osmosis , except one .which one does not directly involve osmosis?
A guard cells losing turgor pressure
B oxygen diffusion into leaves
C transpiration
D translocation

Yes, the correct answer to this multiple-choice question is B.

This is because:
💧Osmosis = Is a type of water diffusion from molecules of a higher concentration of water to a lower concentration of water, through a selectively permeable membrane.

📌But, option "B" involves the word, 'Diffusion' 💨, which is the movement of molecules other than water from areas of high concentration to areas of low concentration

Hope this helps,
Coolmate 8)
« Last Edit: June 04, 2020, 10:08:16 pm by Coolmate »
                                                    🤯HSC 2020:🤯

🔥Advanced Maths🔥 - 📚Advanced English📚 - ☄️Physics☄️ - ✌Biology✌ - 🙏SOR 1🙏 - 👨‍💻IPT👨‍💻

😁My STUDY GUIDE!😁                                                  💬Quote A Day With Coolmate💬

Chocolatepistachio

  • Trendsetter
  • **
  • Posts: 107
  • Respect: +2
Re: HSC Biology Question Thread
« Reply #1381 on: June 04, 2020, 05:37:16 pm »
0
Hello for this multiple choice question is the answer c?

Some living cells were maintained in a culture medium under aerobic conditions. They were supplied with glucose labelled with radioactive carbon-14? Which of the following is likely to be true

A carbon14 atoms would be found in NADH
B carbon 14 atoms would be found in atp

C carbon 14 atoms would be found in carbon dioxide produced by the cells
D Carbon 14 atoms would be found in pyruvate

Thanks

Annasimon

  • Adventurer
  • *
  • Posts: 15
  • Respect: 0
Re: HSC Biology Question Thread
« Reply #1382 on: June 04, 2020, 06:10:36 pm »
0
Would the answer for this question be d??

Which of the following best describes a gene?
A a single DNA molecule wound around proteins
B one leg of a pair of blue denim pants
C an allele that exists in 2 or more forms
D. A sequence of DNA nucleotides that encode a protein
Thanks!

Annasimon

  • Adventurer
  • *
  • Posts: 15
  • Respect: 0
Re: HSC Biology Question Thread
« Reply #1383 on: June 04, 2020, 06:12:04 pm »
0
Isnít translocation the movement of sugars though not the movement of water?

Coolmate

  • MOTM: SEP 19
  • Forum Obsessive
  • ***
  • Posts: 400
  • 🔥Goodluck w/ HSC Trials Everyone!
  • Respect: +171
Re: HSC Biology Question Thread
« Reply #1384 on: June 04, 2020, 10:10:34 pm »
0
Isnít translocation the movement of sugars though not the movement of water?

Yes, that's true I just modified the above answer. Translocation is the movement of sugars and other food substances from the leaves to rest of the plant via the Phloem, not the movement of water.
                                                    🤯HSC 2020:🤯

🔥Advanced Maths🔥 - 📚Advanced English📚 - ☄️Physics☄️ - ✌Biology✌ - 🙏SOR 1🙏 - 👨‍💻IPT👨‍💻

😁My STUDY GUIDE!😁                                                  💬Quote A Day With Coolmate💬

Coolmate

  • MOTM: SEP 19
  • Forum Obsessive
  • ***
  • Posts: 400
  • 🔥Goodluck w/ HSC Trials Everyone!
  • Respect: +171
Re: HSC Biology Question Thread
« Reply #1385 on: June 04, 2020, 10:30:48 pm »
0
Would the answer for this question be d??

Which of the following best describes a gene?
A a single DNA molecule wound around proteins
B one leg of a pair of blue denim pants
C an allele that exists in 2 or more forms
D. A sequence of DNA nucleotides that encode a protein
Thanks!

I would say the answer to this question is "D".

Because:
Genes are made up of sequences of DNA nucleotides and these genes encode for proteins which control cell function. Thus, I would say "D" is the answer as it sounds most correct.

Hope this helps,
Coolmate 8)
                                                    🤯HSC 2020:🤯

🔥Advanced Maths🔥 - 📚Advanced English📚 - ☄️Physics☄️ - ✌Biology✌ - 🙏SOR 1🙏 - 👨‍💻IPT👨‍💻

😁My STUDY GUIDE!😁                                                  💬Quote A Day With Coolmate💬

Annasimon

  • Adventurer
  • *
  • Posts: 15
  • Respect: 0
Re: HSC Biology Question Thread
« Reply #1386 on: June 04, 2020, 11:25:49 pm »
0
Sorry for all the questions...

How would you explain the relationship between the circulatory and respiratory systems?
They both work together to maintain homeostasis ..?


Chocolatepistachio

  • Trendsetter
  • **
  • Posts: 107
  • Respect: +2
Re: HSC Biology Question Thread
« Reply #1387 on: June 05, 2020, 04:10:24 pm »
0
hello, i have a question
which organisms undergo mitosis without cytokinesis following and why would cells which undergo mitosis and not cytokinesis have 1 cell and 2 nuclei?


Thanks

kauac

  • Forum Leader
  • ****
  • Posts: 522
  • Respect: +259
Re: HSC Biology Question Thread
« Reply #1388 on: June 05, 2020, 08:33:39 pm »
0
Sorry for all the questions...

How would you explain the relationship between the circulatory and respiratory systems?
They both work together to maintain homeostasis ..?

Hi, I think that's a great way of explaining it!

You can talk specifically about the homeostasis mechanisms they are involved. e.g. balance of O2 and CO2.

You could even say that they are codependent on each other - because the circulatory system provides O2 rich blood to the lungs and respiratory muscles, and the lungs provide an oyxgen supply for the heart muscle to stay healthy.  :)
2018: HSC

2020-2024: B Science / M Nutrition & Dietetics @ USYD

Chocolatepistachio

  • Trendsetter
  • **
  • Posts: 107
  • Respect: +2
Re: HSC Biology Question Thread
« Reply #1389 on: June 05, 2020, 08:54:45 pm »
0
Hello for this multiple choice question is the answer c?

Some living cells were maintained in a culture medium under aerobic conditions. They were supplied with glucose labelled with radioactive carbon-14? Which of the following is likely to be true

A carbon14 atoms would be found in NADH
B carbon 14 atoms would be found in atp
C carbon 14 atoms would be found in carbon dioxide produced by the cells
D Carbon 14 atoms would be found in pyruvate

Thanks

Pls can someone help me with this question

kauac

  • Forum Leader
  • ****
  • Posts: 522
  • Respect: +259
Re: HSC Biology Question Thread
« Reply #1390 on: June 05, 2020, 09:14:41 pm »
0
Pls can someone help me with this question

Hi!

This is a tricky question! I'm not entirely sure why the answer is c, but maybe it's something to do with CO2 being the only option that is a by-product of aerobic respiration - whereas the others are helpful metabolites!

Hopefully someone else may have a better idea of why it's C.  :)
2018: HSC

2020-2024: B Science / M Nutrition & Dietetics @ USYD

Einstein_Reborn_97

  • MOTM: April 20
  • Forum Regular
  • **
  • Posts: 89
  • There is no substitute for hard work.
  • Respect: +38
Re: HSC Biology Question Thread
« Reply #1391 on: June 05, 2020, 09:36:13 pm »
+1
Hello for this multiple choice question is the answer c?

Some living cells were maintained in a culture medium under aerobic conditions. They were supplied with glucose labelled with radioactive carbon-14? Which of the following is likely to be true

A carbon14 atoms would be found in NADH
B carbon 14 atoms would be found in atp

C carbon 14 atoms would be found in carbon dioxide produced by the cells
D Carbon 14 atoms would be found in pyruvate

Thanks
Yeah I'm pretty sure it's C. The question states "aerobic conditions" so that implies that aerobic cellular respiration was being observed. In cellular respiration, the reactants are glucose (which was supplied with radioactive carbon-14) and oxygen, whilst the products are carbon dioxide and water. The logical aim of this experiment would be to trace the movement of the glucose molecules and the logical conclusion would be that the carbon-14 isotope ends up in the carbon dioxide product. Therefore, the answer should be C.
HSC 2020: Advanced English | Advanced Mathematics | Physics | Chemistry | Biology | Studies of Religion 2

My HSC Journey Journal

Chocolatepistachio

  • Trendsetter
  • **
  • Posts: 107
  • Respect: +2
Re: HSC Biology Question Thread
« Reply #1392 on: June 05, 2020, 10:31:23 pm »
0
Ok thanks!

Also for this question
From which of the following is the waste product urea formed
A sugars
B fats
C protein
D Glycerol

Is the answer c??

Einstein_Reborn_97

  • MOTM: April 20
  • Forum Regular
  • **
  • Posts: 89
  • There is no substitute for hard work.
  • Respect: +38
Re: HSC Biology Question Thread
« Reply #1393 on: June 05, 2020, 11:01:48 pm »
+2
Ok thanks!

Also for this question
From which of the following is the waste product urea formed
A sugars
B fats
C protein
D Glycerol

Is the answer c??
Yes. The liver breaks down excess amino acids (which make up protein) to make ammonia, then converts this into urea.
HSC 2020: Advanced English | Advanced Mathematics | Physics | Chemistry | Biology | Studies of Religion 2

My HSC Journey Journal

Chocolatepistachio

  • Trendsetter
  • **
  • Posts: 107
  • Respect: +2
Re: HSC Biology Question Thread
« Reply #1394 on: June 05, 2020, 11:27:00 pm »
0
For this question:

Atp synthase produces atp.....

A during the electron transport chain in the krebs cycle of cellular respiration
B only during glycolysis in cellular respiration
C in cellular respiration and the light dependent reactions of photosynthesis
D directly from the photolysis of water

Would it be a??

Thank you for your help!