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
Lubov Fominskaja [6]
3 years ago
12

In their 1953 paper on the double-helical structure of DNA, Watson and Crick famously wrote: "It has not escaped our notice that

the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material." What did they mean?
Biology
1 answer:
dsp733 years ago
8 0

Answer:

The statement suggests ability of existing DNA molecule to replicate itself by the process of DNA replication. Each strand of double helical DNA can serve as template for the synthesis of new complementary DNA strand.

Explanation:

Watson and Crick proposed the double-helical structure of DNA. Accordingly, the DNA molecule is a double helical structure in which two polynucleotide chains are held together by base pairing between the complementary bases of two chains.  

There are four nitrogenous bases present in DNA: adenine and guanine (purines) and cytosine and thymine (pyrimidines). Adenine always pairs with thymine and cytosine pairs with guanine base.  

According to Watson and Crick, the ability of one DNA strand to base-pair with a complementary DNA strand suggests the existence of the DNA replication process. During DNA replication, each DNA strand should serve as a template to specify the nucleotide sequence of the new DNA strand.  

You might be interested in
Students use a microscope to look for structures present in four different cells. The students placed an X for each structure th
Thepotemich [5.8K]

Cell Y.

Answer: Option C.

<u>Explanation:</u>

Prokaryotic cells are the cells that do not possess a true nucleus. They do not even possess a membrane bound organelles. Organisms with in the domains bacteria and Archaea have prokaryotic cells. The other forms of life are the eukaryotic.

It is a unicellular organism. The word prokaryotic comes from a Greek word. The prokaryotic cells have a cell membrane or a plasma membrane which acts like a protective shield. Along with this, they also have a rigid cell wall which acts like further support and protection.

6 0
3 years ago
Read 2 more answers
The client with full thickness burns over 30% of the body reports weakness and cramping in the lower extremities with palpitatio
lukranit [14]
////hypokalemia/////
7 0
3 years ago
** ALL MY POINTS**
Flura [38]

PART 1


1. The answer is low frequency electromagnetic waves are able to go around obstacles due to their larger wavelengths. This characteristic of lower frequency waves is due to their ability to diffract around obstacles such as buildings and hills. Therefore, they transmit over long distances unlike high frequency electromagnetic waves.

2. One disadvantage is interference. Electromagnetic waves of the same frequency transmitted at the same time will interfere with one other and therefore the signal will be lost or scrambled. Other electromagnetic waves such as microwaves are affected (interfered with) by weather elements.

3. Analogue signals are continuous signals with wave-like properties while digital signals are discrete signals or pulse (ons (1s) and offs (0s) that represent bits). Analogue signal is represented by a sine-wave while digital signal is represented by discrete squares waves.

4. Digital signals are less immune to eavesdropping unlike analogue signals. Analogue signal is also more prone to distortion unlike digital signal. Digital signals transmit more data than analogue signals. Digital signal draw less energy to transmit compared to analogue signal.

5. Broadcasting of TV is nowadays using digital signals due to the high number of available channels. Computers and the interne utilize digital signaling to transmit data. Controls systems such as radar system also use aspects of analogue waves. Sensors also utilize analogue waves especially transducers such as seismology equipment.


PART 2


1. One way is by sending radio waves to probes sent out in space to give them commands during exploration. Radio telescopes also pick up naturally-occurring radio waves from space and analyze the data to make conclusions about space and the astronomical objects.

2. Radio waves are used in communication by transmitting data over long distances. One example is its use TV transmission. Another is through military defense of airspace. The radio waves are used to detect enemy intrusion into restricted airspaces using radar.

3. It is common that signal from the environment will be in analogue signal format. The conversion to digital signals allows for the digital equipment in the telescope to interpret and analyze the data. Telescopes prefer digital equipment because they consume less power, handle more data, and are less prone to intrusion, and distortion, hence more secure to analogue equipment.



3 0
3 years ago
Read 2 more answers
Which of the following is true about environmental tobacco smoke (ETS)?
qaws [65]

Answer:

ETS is responsible for more lung cancer deaths than heart disease deaths annually

4 0
2 years ago
What is the best definition for the biological purpose of cellular respiration?
REY [17]

Answer:

Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert chemical energy

Explanation:

3 0
3 years ago
Other questions:
  • Which of the following are examples of large-scale mutations?<br> Put the things in order plz.
    5·1 answer
  • What is replication and what is its importance
    8·1 answer
  • Which of these is an example of an ectoparasitic relationship
    12·2 answers
  • I don’t know the answer I need help
    6·1 answer
  • What is the scientific name of a giraffe using
    12·2 answers
  • A cell spends most of its time in what phase of the cell cycle
    7·2 answers
  • What Structure formed by the crossing over of the optic nerves
    7·1 answer
  • In any ecosystem, blank are the point for energy for new energy.
    6·2 answers
  • 15 POINTS PLUS BRAINLIEST IF ANSWERED IN 5 MINS
    11·1 answer
  • Johanna learns that the Law of Conservation of Energy states that energy is conserved, never lost. Which of the following best d
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!