1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ICE Princess25 [194]
3 years ago
12

Look at the following, and decide if they are carbohydrates or not.

Biology
1 answer:
Aliun [14]3 years ago
4 0

Answer:

A. C4H8C4  - NOT

B. C12H12C4  - NOT

C. CóH1206  - yes

D. C4H2020 - NOT

Explanation:

Carbohydrates are one of macro molecules made up of carbon, hydrogen and oxygen. These are essential molecule as they provide nutrition and makes structural component in plants too.

The ration of carbon, hydrogen and oxygen is similar in almost every sugar or carbohydrate which is 1:2:1, one carbon molecule and one oxygen molecule per two molecule of hydrogen.

In choice A, and B have no oxygen molecule so they can not be carbohydrate, where as D have inappropriate ration in comparison to the carbohydrates.

Thus, the correct answer is :

A. C4H8C4  - NOT

B. C12H12C4  - NOT

C. CóH1206  - yes

D. C4H2020 - NOT

You might be interested in
What is Cytomembrane System? How does it work? What are it's parts?
Radda [10]
Cytomembrane System 
<span>Membranes physically connected or connected by transfer of vesicles. </span>
<span>Membranes exhibit various thicknesses, composition and behavior, both in space and time! </span>
<span>Organelles included: </span>
<span>endoplasmic reticulum (ER).</span>
<span>nucleus. </span>
<span>Golgi apparatus. </span>
<span>lysosomes, vacuoles and microbodies.</span>
3 0
3 years ago
Which of these substances would a soil layer close to the surface least likely contain?
san4es73 [151]
I think it’s B or C
5 0
3 years ago
A DNA fragment is introduced into the lacZ gene of a plasmid, which also contains an ampicillin resistance gene. What is the app
zhenek [66]

Answer: The bacteria transformed with this particular plasmid will form white colonies on the plates containing ampicillin and Xgal.

Explanation: The lacZ gene produces an enzyme called β-galactosidase which is responsible for the breakdown of lactose into glucose and galactose. The lacZ gene is one of the three genes (the other two being lacA and lacY) of the lac operon which is responsible for the transport and mechanism of lactose in E. coli and many other bacteria.

In recombinant DNA technology, when a plasmid is to be used to transform a host cell, such markers are used to help screen the transformed cells from the ones that have not taken up the plasmid. Xgal present in the plates is an artificial substrate which is hydrolyzed by

β-galactosidase into 5-bromo-4-chloro-indoxyl which will dimerize and oxidise into 5,5'-dibromo-4,4'dichloro-indigo. This is a blue pigment which will give blue color to the bacterial cells. Introducing a DNA fragment in this lacZ gene will make it non-functional so it will not be able to produce the enzyme.

Therefore, when a bacterial cell is transformed with a plasmid containing ampicillin resistance gene and a DNA fragment introduced in the lacZ gene and then grown on plates containing ampicillin and Xgal, white colored colonies will appear. The white colonies will show the bacterial cells that have successfully taken up the plasmid with the DNA fragment incorporated in the lacZ gene as this will render the gene non-functional and will not produce β-galactosidase which will breakdown Xgal to give blue colonies. Since the plates contain ampicillin, only the bacterial cells that have been successfully transformed with the plasmid ( the ones that have the DNA fragment and the ones without it) will grow as the ampicillin resistance will give them resistance against ampicillin in the plates. The bacterial cells that have not taken up the plasmid will not be resistant to ampicillin and will not form colonies on the plate.

This is called blue-white screening which is used to identify successfully transformed host cells. A picture of this is given in the attachment, taken from the following website:

https://www.mun.ca/biology/scarr/Blue_&_White_Colonies.html

8 0
3 years ago
A nurse is working with a group of patients. one patient states, "my goal is to reduce my weight from 280 pounds to 230 pounds i
kirill115 [55]
Its definitely not A or D because there are 26 weeks in 6 months.

generally, a weight loss of 1-2 lbs per week is reasonable and safe. 

I would say B because it is unrealistic that someone would always lose 2lbs a week
7 0
3 years ago
Read 2 more answers
A student wants to model convection currents in the Earth's mantle. Which of the following should the student use
marishachu [46]
The answer is C I know for a fact it is
5 0
3 years ago
Other questions:
  • Consider the model of the food chain. Imagine a local farm has dumped excess pesticides in the pond used for irrigation. This wi
    14·2 answers
  • What are three scientific discoveries that have made health care what it is today?
    10·1 answer
  • When gametes are produced from a parent cell during normal meiosis, which of the following describes the number of chromosomes i
    7·1 answer
  • The stretch reflex in a skeletal muscle is initiated because of nerve impulses arising from an organ embedded in the muscle call
    12·1 answer
  • This amniotic egg contains the nutrients that the growing embryo needs to develop correctly. Which of the following is an essent
    12·1 answer
  • What is Alzheimer’s Disease and how is it caused from the chromosomes?​
    5·1 answer
  • HELP WILL GIVE BRAINLIEST A scientist is studying a new species of bird found in the Amazon. She suspects that it is demonstrati
    7·1 answer
  • In the walls of the heart, two layers of tissue form a sandwich around a thick layer of muscle called the ______________________
    6·1 answer
  • Come all girls to show and see<br><br> vpd-jjzw-rub <br><br>Come see my dìçk​
    13·2 answers
  • A cross between two individuals that are heterozygous for eye and skin color would be an example of a _____ cross.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!