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Mkey [24]
2 years ago
12

Explain 4. When are chemical properties observable?

Biology
1 answer:
mihalych1998 [28]2 years ago
7 0
They are observable when there is a change in color, smell, temperature, and there is a precipitate or formation of bubbles.
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Why did Hershey and Chase label the viral DNA with radioactive phosphorous and not radioactive sulfur?
Ahat [919]
Dna contains sulfur and little phosphorus
4 0
3 years ago
A student isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. After adding some D
aivan3 [116]

Answer:

DNA ligase

Explanation:

DNA replication is an enzyme mediated, 3-step process during which the DNA molecule produces a copy of itself. The 3 steps involved are as follows;

  • initiation
  • elongation
  • termination

<em>Initiation </em>involves the unwinding of the double helix structure of the DNA using DNA helicase enzyme

<em>Elongation</em> involves binding of RNA primer to the DNA strands and addition of bases to the primer<em> </em>to elongate the new chains. Bases are added to the leading strand continuously while the lagging strand is replicated in short segments (okazaki segments).

<em>Termination</em> involves the unbinding of RNA primer and substitution of its bases by DNA bases. The Okazaki fragments are then joined together using the DNA ligase enzyme.

<em>The short, numerous segments of DNA observed in the mixture is the Okazaki fragments of the lagging strand. This is due to the absence of the enzyme involved in the joining of these fragments.</em>

Hence, the answer is DNA ligase.

4 0
3 years ago
Are gender traits completley a result of societal expectatcions ?
Romashka [77]
Typically gender expression is heavily influenced by societal norms, but there are some traits that have been proven to be influenced my genetic makeup of males vs females. For example, girls tend to be drawn to more artistic expression because of the cone/rod ratio of their eyes, where as males have better perception of depth and speed, so they gravitate towards faster sports and race cars. Obviously this only has partial influence. Individuals have always ventured outside gender roles and norms. Some men express are in touch with their femininity and express it despite the stigma, and some women have more ‘male inclined’ personality traits. Of course, large political, philosophical, and religious movements have more impact, such as the feminist movement in the late 1960s-70s pushing females to act less in the traditional frame.
7 0
3 years ago
Unicellular organisms would most likely have _____.
Deffense [45]
Isogametes because they have the same size and shape.
6 0
2 years ago
Read 2 more answers
Reproductive cell or sex cells are called
enot [183]
I agree with the person above - reproductive cells or sex cells are called gametes. 
When it comes to women, these gametes are called an ovum, or an egg, and when it comes to men, gametes are called sperm. 
8 0
3 years ago
Read 2 more answers
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