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olga55 [171]
2 years ago
8

Which of the following statements is not true about mRNA?

Biology
1 answer:
musickatia [10]2 years ago
8 0

Answer:

The correct answer is d. eukaryotes almost always produce polycistronic  mRNA

Explanation:

In eukaryotes one transcription unit contains the information of only one gene which codes for only one protein or polypeptide therefore eukaryotic mRNA is called monocistronic mRNA.

In prokaryotes transription unit contains set of genes adjacent to each other which are transcribed together and codes for multiple proteins. So prokaryotic mRNA is called polycistronic mRNA.

Almost all messenger RNA present in eukaryotes are monocistronic mRNA because eukaryotes are more complex than prokaryotes and require modification at many stages which is easily possible with monocistronic mRNA.

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What molecule(s) link the light reactions (stage 1 of photosynthesis) to the Calvin cycle (stage 2 of photosynthesis)?
Zina [86]

Answer:

ATP and NADPH

Explanation:

The photosynthetic process carried out by plants involves two distinct stages: the light-dependent stage and the Light-independent stage. The light-dependent stage occurs in the thylakoid membrane of the CHLOROPLAST and it involves a series of chemical reactions that results in the formation of an energy storage molecule (ATP) and reduced electron carrier (NADPH).

These molecules enters the Calvin cycle or light-independent stage. The chemical energy of ATP and reducing ability of NADPH are used to phosphorylate and reduce a 3-carbon compound (PGA) in the Calvin cycle. These two molecules (NADPH and ATP) are important to keep the Calvin cycle in place. Hence, the Calvin cycle is dependent on the light reaction and this two molecules link the two stages.

4 0
3 years ago
Equilibrium seems to have occurred
Ganezh [65]
A state in which opposing forces are balanced
3 0
3 years ago
Describe how an organism has 2 sets of dna and the importance of homologous chromosomes
LenKa [72]
Most organisms are Diploid, and as a result, they will have received 2 copies of the chromosomes, or sets of chromosomes, from both their parents. This they will have 2 sets of Genes that will perform almost exact same process, except with different phenotypes.

These chromosomes need to be homologous, in order for new alleles and other genetic combinations to be made.

7 0
3 years ago
Jacque is hiking in the mountains and sees a very large and colorful rock layer. It looks different than the surrounding rock la
melisa1 [442]

Answer:

Check if the rock layer has fossils in it.

Explanation:

The rock layer from the inside out and the fossils will tell you how old the rock is.

6 0
2 years ago
Help please 20 points i mark u as brainlist
Artyom0805 [142]

Answer:

a. Mastication process and formation of bolus in the oral cavity

b. The contraction in the stomach breaks the food down into smaller pieces. These pieces are then moved to the small intestine.

c. In the small intestine, food particles are broken down into nutrients, fat, protein and carbohydrates which are absorbed into the bloodstream.

Explanation:

a. First step of digestive system functioning is the mastication process and formation of bolus in the oral cavity.

b. The contraction in stomach, with the help of digestive enzymes and acids, break the food down into smaller pieces. The small pieces of food are then released into the first part of the small intestine (duodenum).

c. In the small intestine, two enzymes released from pancreas and gall bladder break down the food particles into fats, proteins, and carbohydrates. Thereon, nutrients and carbohydrates, proteins and fats are absorbed into the bloodstream.

5 0
3 years ago
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