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
Alex_Xolod [135]
3 years ago
12

5. What is the main function of leaves?

Biology
1 answer:
elena55 [62]3 years ago
3 0

Explanation:

It contains chlorophyll which the plant uses for photosynthesis when there is sunlight.

Transpiration also occurs on the leaves.

You might be interested in
Which step in transcription occurs first?
marusya05 [52]

Answer:

<em>Option 3 </em>: RNA polymerase attaches to the promoter.

Long Answer:

<h2>What is RNA? How is RNA produced?</h2>

RNA is a nucleic acid that is single stranded and comparable to DNA. DNA is also known as deoxyribonucleic acid, whereas RNA is short for ribonucleic acid. The word "ribo" in the name refers to the kind of sugar that makes up the nucleic acid backbone. Although RNA comes in a variety of forms, the three primary kinds all play crucial roles in the cell's translation of the DNA code into functional proteins. A copy of a gene's DNA sequence, known as messenger RNA, exits the cell's nucleus. A ribosome converts the sequence in the mRNA into a polypeptide (unprocessed protein). RRNA is used to make ribosomes (ribosomal RNA). The polypeptide's building blocks, amino acids, are joined to tRNAs (transfer RNAs). Transfer RNAs ensure that the right amino acid is delivered to the polypeptide that the ribosome is producing by matching with their complement bases on the mRNA.

<h2>What is transcription in biology?</h2>

Transcription is the biological process through which a complementary RNA strand is created using DNA as a template. This is the initial phase of either the creation of proteins or the transfer of information inside a cell. Genetic information is stored in DNA, which is subsequently used to transmit it to RNA during transcription and then control the synthesis of proteins during translation. Messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA are the three forms of RNA that may be produced (rRNA). Pre-commencement, initiation, elongation, and termination are the four phases of transcription. By attaching to a promoter region at the 5' end of a DNA strand, the RNA polymerase subunit starts pre-initiation, also known as template binding. The enzyme can access the template strand because the DNA strand is denatured, which separates the two complementary strands. Partner strand refers to the opposite strand. The DNA strand's promoter sequences are essential for the effective start of transcription.The identification of some of these motifs, including TATAAT and TTGACA in prokaryotes and TATAAAA and GGCCAATCT in eukaryotes, has been determined. Promoter sequences are particular sequences of the ribonucleotide bases making up the DNA strand (adenine, thymine, guanine, and cytosine). These patterns are referred to as cis-acting elements. For RNA polymerase to more easily attach to the promoter region in eukaryotes, an extra transcription factor is required.

<h2>What is the process of transcription and translation within biology? What are some examples?</h2>

First, the double-stranded DNA unzips, and the mRNA strand generated (the sense transcript) will be complementary to the original strand of DNA (therefore containing particular codons/triplets of bases) and connected to the DNA through hydrogen bonds between complementary bases. Following this, the mRNA generated will separate from the DNA, exit the nucleus through a hole, and enter the cytoplasm. Then it will connect to a ribosome, which is where translation takes place. Specific amino acids are delivered to the ribosome via tRNA anticodons that are corresponding to the mRNA codons (as they have specific amino acid binding sites). When two tRNA molecules are present in the ribosome, they keep the amino acids in place while a condensation process creates peptide bonds between them to form a dipeptide. This procedure is repeated to create a polypeptide chain or protein by condensation polymerization, which has a certain primary structure because it contains a particular amino acid sequence or order. The translation step is now. Due to specific interactions (such as ionic bonds, disulfide bridges, covalent bonds, and hydrogen bonds) between particular R groups, this structure folds in a specific way, resulting in the secondary structure, which can be an alpha helix or a beta pleated sheet, and then the functional tertiary (3D) protein, which has a specific structure and consequently a specific function. As a result, it influences a cell's structure and functionality, leading to its specialization. A quaternary structure can be created by making further changes to the tertiary structure. This happens when the tertiary structure is linked to another polypeptide chain (for example, collagen is a fibrous protein made up of three polypeptide chains wound around one another and joined by hydrogen bonds) or another non-polypeptide group via covalent bonding or London forces/permanent dipole forces/ion dipole forces to form a conjugated protein (for instance, the conjugated globular protein haemoglobin contains the prosthetic group Fe2+). Thus, some proteins with a particular structure and consequent function are generated during translation. These proteins alter the structure and function of the cell, leading to its specialization.

#SPJ6

3 0
1 year ago
Which molecules of the adaptive defense system provide humoral immunity by circulating freely in the blood and lymph, where they
alisha [4.7K]

Answer:

Adaptive immune defense system consists of lymphocytes like B-lymphocytes and T- lymphocytes. B-lymphocytes provides humoral immunity while T- lymphocytes provide cell-mediated immunity to the body.

99% of lymphocytes circulate freely in the blood and lymph. B lymphocytes differentiate into plasma B cells and B memory cells when interact with antigen presented by T helper cells.  

Then plasma cells secrete antibodies in the circulation which binds to extracellular antigens through antigen-binding site. Then the bounded antigen is recognized by receptors present on phagocytic cells. This receptor binds the Fc region of antigen bounded antibody and destroy the antigen by phagocytosis.

5 0
2 years ago
HISTORICAL DATA QUIZ IN SCIENCE PLZZ HELPP ME BEEN HAVING A ROUGH DAY IF YOU COULD HELP I WOULD REALLY APPRECIATE ITT ASAPPP
Ivan

Answer:

c. Montana

Explanation:

Although many states have dinosaur sites, so far the states that seem to be the most prolific producers of fossils are Colorado, Utah, Wyoming, and Montana.

6 0
3 years ago
Similarities and differences between RNA and DNA?
Lilit [14]
DNA and RNA both contain a cyclic nitrogenous base, a posphate group and a five-carbon sugar.  These are the base units of nucleotides which make up nucleic acids.  DNA contains the nitrogenous bases; adenine, thymine, cytosine and guanine wheresas RNA contains the bases; adenine, thymine, cytosine and urasil.  DNA codes for the nucleotides in an RNA molecule, whereas DNA codes for the amino acid sequence in a protein 
3 0
3 years ago
The fire extinguisher can ONLY be used by the teacher in an emergency <br><br> True<br> False
Maksim231197 [3]
False. Probably I don’t have much context
3 0
3 years ago
Other questions:
  • In all muscle cells, two kinds of protein filaments slide past each other to shorten the muscle cell and generate force. what br
    8·1 answer
  • Farmers consider pesticides and fertilizers necessary to ensure successful farming. What problems are caused by the use if these
    5·2 answers
  • Name a natural polymer
    7·2 answers
  • An antenatal G2, T1, P0, A0, L1 client is discussing her postpartum plans for birth control with her health care provider. In an
    14·1 answer
  • The diagram shows the fossils found in different layers of a rock.
    11·2 answers
  • What happens to food material that cannot be digested?
    9·2 answers
  • Where in the plant are the hormones auxins produced? (Select all that apply.)
    5·2 answers
  • Someone plz help me :(
    12·2 answers
  • Why it is important for a cell to be able to differentiate?
    12·1 answer
  • What is the expected size of the world's population in 2050?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!