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Inessa [10]
3 years ago
6

1. Which scientist developed the heliocentric model for the solar system?

Biology
1 answer:
Llana [10]3 years ago
6 0
Answer: B. Copernicus
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Where does transcription take place in the cell
bixtya [17]

In a prokaryotic cell, transcription and translation are coupled; that is, translation begins while the mRNA is still being synthesized. In a eukaryotic cell, transcription occurs in the nucleus, and translation occurs in the cytoplasm.

Hope This Helps!    Have A Nice Day!!

7 0
3 years ago
Describe how restriction enzymes and ligase enzymes are used to make the plasmids that are introduced to bacteria cells during t
balandron [24]

Answer:

DNA restriction enzymes cut the DNA molecule, while DNA ligases join the resulting DNA fragments

Explanation:

Transformation is a naturally occurring process by which bacteria incorporate exogenous genetic material from their surrounding environment. This process (transformation) is used for DNA cloning via plasmid vectors. In DNA cloning, transformation occurs after restriction enzymes cut the DNA at specific sequences named palindromic sequences (i.e, sequences that can be read the same in opposite direction). Restriction enzymes can generate sticky-ends, where enzymes make staggered cuts in the two strands (e.g., <em>BamH</em>), or blunt ends, where the resulting strands are of the same length (e.g., <em>HaeIII</em>). In general, sticky-end enzymes are more useful because they generate a 3' overhang in one molecule and a complementary 5' overhang in the other, increasing the yield and specificity of ligation. During ligation, a DNA ligase is used to join both DNA strands by forming phosphodiester bonds in the plasmid. Following transformation, bacteria can be selected on antibiotic plates.

8 0
3 years ago
BRAINLIEST!!!<br> 4. Eons are longer units of time than eras.<br> True<br> False
Oksana_A [137]
An eon is 1.05 billion years and an era is 350 million years
3 0
3 years ago
A motorbike travels 45 miles in 3 hours, what is its speed ????
rodikova [14]

Answer:

speed = distance/ time= 45/3 = 15miles per hour

Explanation:

7 0
3 years ago
Read 2 more answers
Fears of radiation exposure from normal use of such detectors are largely unfounded. identify reasons why 241am smoke detectors
maxonik [38]
The reasons why  241am smoke detectors are perfectly safe is because;
(i)   The amount of americium is very little.
(ii)   The aluminium core is where the detector is hosted.
(iii)  The detector has a plastic cover.
(iv)   Radiation is limited in penetrating power.
(v)    There is a low number which is leaving the case.
(iv) ions get trapped by electrodes.
7 0
3 years ago
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