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Ivan
4 years ago
10

One hypothesis for the original function of precursors of charged trna is that

Biology
1 answer:
lana66690 [7]4 years ago
4 0

tRNA-precursors were smaller than the modern tRNA and their primary function was to participate in the formation of new structures by joining two or more RNA molecules.

The adaptor hypothesis is the explanation of how information could be extracted from a nucleic acid into a string of amino acids in a specific sequence. The proposed explanation involved recognition between the adaptor (today tRNA) and the template nucleic acid .


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Look at the DNA segment below. GATCGT Which of the segments below would be complementary to the segment above during DNA replica
miss Akunina [59]

Answer:

CTAGCA

Explanation:

During DNA replication, the DNA double helix is unwound by DNA helices. Each original strand is then used as a template,  by the DNA polymerase, to synthesize a new strand. Base pairing rules apply in the synthesis. Cytosine pairs with Guanine while Adenine pairs with Thiamine.

5 0
3 years ago
If the frequency of an allele is 0.75, how many copies of this allele should be in a population of 300 diploid individuals?
Ray Of Light [21]

I have provided the options below:

a. 150

b. 225

c. 300

d. 450

e. 75

Answer:

150

Explanation:

Hardy-Weinberg law states, the allelic frequencies of a gene that is, q and p follow the relationship p^2+q^2+2pq = 1, if the population is in equilibrium.

Therefore p^2+q^2+2pq = 1, can be used to calculate the percentage of the allelic frequencies i.e. p^2 and q^2

Allelic frequency = 0.75.

Therefore, the percentage of the allele in the population would be given by

0.75^2 = 0.5625 = 56%.

And the total number of individuals with this allele in the population:

number of individuals = 56×300÷100

= 168 or

150 nearest figure.

8 0
4 years ago
What is the biodiversity score of farmland (maize)?
Karolina [17]

Answer:

<h3><u>Required Answer</u><u>:</u><u>-</u></h3>

The intensification of agriculture has caused dramatic declines in farmland biodiversity (Carvalheiro et al., 2013; Senapathi et al., 2015). Since the 1990s, agricultural policies have been developed in Europe to mitigate this loss through agri-environmental schemes (AES). One AES is “sown wildflower strips”, the aim of which is to create new ecological infrastructures by sowing attractive wild flowers on arable land (a few % of the cultivated area). These ecological infrastructures fall within our definition of MIMS since they represent a massive introduction of managed species in the landscape.

7 0
3 years ago
Wood deposits recovered from an archaeological site contain 36% of the C-14 they originally contained. How long ago did the tree
Veseljchak [2.6K]

Answer: It was obtained 8515 years ago

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process  

a) to find the rate constant:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.693}{5760}=0.00012years^{-1}

b) for completion of 36% of reaction

t=\frac{2.303}{k}\log\frac{100}{36}

t=\frac{2.303}{0.00012}\log\frac{100}{36}

t = 8515 years

The time was 8515 years.

3 0
4 years ago
Bioinformatics includes all of the following except __________.
kirill115 [55]

Answer:The correct option is C.

Explanation: The options attached to this question are given below:

A) Using computer programs to align DNA sequences.

B) Analyzing protein interactions in a species.

C) Using molecular biology to provide biological information to a system so that it gets expressed.

D) Development of computer-based tools for genome analysis.

E) Use of mathematical tools to make sense of biological systems.

Bioinformatic is an interdisciplinary field that deals with the collection and analyzing of complex biological information. Bioinformatic is useful for many reasons. For instance, in molecular biology, bioinformatic technique makes it possible for scientists to extract useful information from very large complex data. Bioinformatic techniques can be used to carry out all the processes given in the options with the exception of option C.

7 0
3 years ago
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