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2 years ago

Occasionally a child is born with an extra chromosome 13, but never do you see a child with an extra chromosome 12, why?

1 answer:

3 0

This is because some of the trisomies (one extra chromosome, three instead of two) are fatal, births cannot survive.

Theoretically, trisomies can occur with any chromosome, but often result in miscarriage.

The types of autosomal trisomy that survive to birth in humans are:

Trisomy 8 or Warkany syndrome 2

Trisomy 9

Trisomy 13 or Patau syndrome

Trisomy 18 or Edwards syndrom

Trisomy 21 or Down syndrome.

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The codon AUG specifies the amino acid methionine. What would the tRNA anitcodon be that recognizes this codon?

NemiM [27]

Answer:

UAC

Explanation:

This example portrays that translation, which is the second process of protein synthesis, is about to occur. Translation cannot occur without a special type of RNA called tRNA or transfer RNA.

A tRNA contains a set of three nucleotides called ANTICODON. The tRNA matches an mRNA codon with the amino acid it encodes. The tRNA initially binds to the mRNA and reads the mRNA codon using its anticodon (which is complementary to the mRNA's codon). The actual reading is done by matching the base pairs through hydrogen bonding following the base pairing rule i.e. A-U, G-C. After reading the mRNA codon using its anticodon, it then carries the specific amino acid encoded by that codon it binds to, in order to add to the growing polypeptide chain.

For example, a codon AUG (start codon that signals beginning of translation) will be read by tRNA anticodon, UAC. Since the codon AUG codes for amino acid, Methionine. The tRNA then carries Methionine via its amino acid attachment site and adds to the polypeptide chain (future protein).

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3 years ago

I need help with biology Asap!!!!

jarptica [38.1K]

I think its C... but I'm not too sure. I did some research and couldn't find exactly what you were looking for but, I found loopholes and I think since when the cell increases, the surface area does not affect cell divisions steps. Therefore, I don't think it would change any other way...

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3 years ago

Archaebacteria are ______________ in nature.

morpeh [17]

Explanation:

Spherical is the answer

7 0

2 years ago

Read 2 more answers

tendons of the rotator cuff muscles hold the head of the humerus to the glenoid cavity of the scapula

AnnZ [28]

The rotator cuff muscles hold the head of the humerus to the glenoid cavity of the scapula with subscapularis, supraspinatus, infraspinatus, and teres minor muscles' tendinous.

What is rotator cuff muscles?

The rotator cuff is a collection of muscles in the shoulder that supports stability of the glenohumeral joint while allowing for a large range of motion. The following muscles make up the rotator cuff: Subscapularis. Infraspinatus. Minor Teres.

What is glenoid cavity of the scapula?

The term "glenoid fossa" refers to the glenoid hollow. The pectoral girdle's lateral scapula bone, often known as the shoulder blade, has a slight dip there. The glenohumeral joint connects the upper limb's humerus to the glenoid cavity.

The subscapularis, supraspinatus, infraspinatus, and teres minor muscles' tendinous insertions combine to form the tendinous band known as the rotator cuff. During joint motion, these muscles support the humeral head's rotation against the glenoid fossa.

Therefore, the rotator cuff muscles hold the head of the humerus to the glenoid cavity of the scapula with subscapularis, supraspinatus, infraspinatus, and teres minor muscles' tendinous.

Learn more about rotator cuff muscles from the given link.

brainly.com/question/9486780

#SPJ4

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1 year ago

Biology is the study of living things. anything that is living is called an organism, which is composed of one or more

larisa86 [58]

Cells because all living organisms have cells

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3 years ago