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Biology Q&A Archive of March 6, 2025

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March 6 of 2025

The table below lists characteristics of different DNA technologies. Identify the technology describec in each column. Move the answers to the correct boxes. DNA Fingerprinting DNA Sequencing Microarray Analysis

PCR testing is considered the most accurate test to use for detecting Salmonella in milk samples and Listeria in lunch meat samples. Which best describes why a supplier would want a PCR test to assure consumers their milk is free from Salmonella? A PCR amplifies the amount of Salmonella DNA,…

What does the placement of the band on the gel tell scientists about the DNA sample? A B C D A The shortest DNA fragments take a long time to migrate on the gel and are the bands closest to the well at the top of the gel. B All of the adenine migrates out first, and then the thymine,…

Which techniques involve inserting new DNA into an organism? Select two correct answers. Transgenic crops PCR Cloning CRISPR-Cas 9 Selective breeding

In eukaryotic cells the pre-mRNA undergoes processing. Check the following options that are a type of mRNA processing. --/\$\$/-- This content is protected and may not be shared, uploaded, or distributed. 5'G Cap 3' G Cap 3' Poly A tail 5. Poly A tail removal of exons removal of introns

1.1.10 $ \ldots $ is the hormone responsible for the milk release reflex. A Oestrogen B Progesterone C Prolactin D Oxytocin

art A the example of blood clotting that occurs after a severe cut: a positive feedback loop occurs. negative feedback is the primary mechanism. the clotting process decelerates as the damage to cells in the blood vessel wall releases chemicals the effector, activated by the control center,…

https//session.aandp-mastering.pearson.com/myct/itemView?offset=next\&assignmen <Chapter 01 Chapter Test Chapter Test - Chapter 1 Question 10 Part A Which tissue type lines the inner surfaces of the blood vessels and heart? muscle tissue epithelial tissue neural tissue connective…

Question 5 of 5 Which two factors are needed to calculate the velocity of an object? A. Acceleration B. Direction C. Mass D. Speed SUBMIT

A 26-year-old male with no known co-morbidities was admitted to the Medical Ward of the Accra Technical University Hospital with complaints of knee pain and swelling for a week. Upon physical examination of the patient, the clinician found out that he was pale, his knee was swollen and tender.…

A 45-year-old male presents with prolonged bleeding after minor trauma, easy bruising, and frequent nosebleeds. Lab results show a prolonged APTT, but PT is normal. The patient’s platelet count and bleeding time are within normal limits. Based on the patient's presentation and lab results,…

State two differences in the production of genetically modified bacteria compared to the production of transgenic animals. (2 marks)

Explain why the part of the retina in region Y is very sensitive to dim light.

Explain to me plant reproduction

Sciences/P2 NSC Confidential 2.2 The diagram below represents a phase of meiosis II. 2.2.1 Identify the phase of meiosis shown. Anaphase $ 2_{(1)} $ 2.2.2 State ONE difference between the phase shown in the ciagram above and the same phase in meiosis $ \mathbb{I} $. (2) 2.2.3 Identify…

A 26-year-old male with no known co-morbidities was admitted to the Medical Ward of the Accra Technical University Hospital with complaints of knee pain and swelling for a week. Upon physical examination of the patient, the clinician found out that he was pale, his knee was swollen and tender.…

discuss the effect of temperature on membrane permeability in a cell in about 6 lines and cite, then reference with harvard referencing style

39. Where does haematopoiesis take place? A. Lungs B. Pancreas C. Liver D. Bone marrow 40. Platelets are formed from what type of cell? A. Melanocytes B. Macrophages C. Astrocytes D. Megakaryocytes

33 The hormone erythropoietin stimulates red blood cell production in the red bome milis.on Where in the body is erythropoietin mainly produced? A. Spleen B. Kidncy C. Liver D. Thyroid 34. Forty-five percent of the volume of blood is normally composed of: A. erythrocytes B. leukocytes C.…

12. Predicted Vital Capacity value compared to measured value Below you will see the predicted value (based on age, sex, and height). Using the predicted value for VC and the measured VC from above complete the following equation for each subject. Computed height Subject 1: 175.3 cm Computed…

A. Manecste it I vmphosytu i) Neutruph+! 1). Niaman cells I8. Phe ecll that functions as a play at the site of blecding is the A. Easinupdil B. Red cell c. Platelet b. Neutrophil 29. The cell that function in the defensive mechanism of the body during bacterial infection is A. Neutrophil B.…

There is a population where the frequencies of allele 1 and allele 2 are 0.7 and 0.3 , respectively. Genotype A1A1 has a selection coefficient of 0.2 . What is A1A1's genotype fitness? $ \square $

If a population leaves Hardy-Weinberg equilibrium due to selection how does it return to Hardy-W/einberg equilibrium? Random Mating Mutation Migration Large Population Size

If the allele frequency of $ p $ is 0.6 , what is the allele frequency of $ q $ assuming that the population is at Hardy-Weinberg equilibrium? $ \square $

Figure 1 Northern blot analysis of gene X mRNA in different tissues. ' nt ' is nucleotides. Which TWO exons are present in the mature spliced mRNA in muscle? 1 and 2 1 and 3 1 and 4

3.2 Amylase is an enzyme that hydrolyses (breaks down) starch into sugars in humans. Sipho conducted an investigation where a solution of amylase was mixed with a starch suspension. The mixtures were kept in water baths at different temperatures for 15 minutes each. At the end of the time,…

f) Coefficient of Variation. [1] g) Range. [1] Question 3 [7 marks] In the study to assess the variation of invasive cacti recorded in the study, the frequency of species found in the random sample of quadrats are as follows: \begin{tabular}{|l|l|} \hline Species & Frequency \\ \hline Opuntia…

QUESTION 3 3.1 The diagram below shows an enzyme - controlled reaction. Study it and answer the questions that follow. 3.1.1 Identify part a) A (1) b) $ \quad B $ (1) 3.1.2 Explain how temperature affects enzyme activity (3) 3.1.3 Enzymes are specific in their action. Explain this (3)…

3 SECTION A NSC QUESTION 1 1.1 Various options are provided as possible answers to the following questions. Choose the answer and write only the letter ( $ A-D $ ) next to the question numbers (1.1.1 to 1.1.4) in the ANSWER BOOK, e.g. 1.1.11 D 1.1.1 The basic unit of carbohydrates is A…

8 - State two reasons why transgenic animals are produced. (2 marks)

State two differences in the production of genetically modified bacteria compared to the production of transgenic animals. (2 marks)

8. Convection currents are powered by: a. Motion b. Pressure c. Heat d. Density A B C D

Describe how bacteria can be modified to produce a human protein. (5 marks) - i need 5 points

Which part of the retina does point X represent? (1 mark) Give a reason for your answer. (1 mark) Explain why the part of the retina in region Y is very sensitive to dim light. (2 marks)

Analyse the data to describe the effect of repeated touching on the time taken for the gill to be exposed again.

11. Which transport system uses protein channels to move substances across the membrane without ATP? A. Active transport B. Simple diffusion C. Facilitated diffusion D. Endocytosis

With reference to the structures of dopamine and L-dopa, give reasons why the drug L-dopa is effective in the treatment of Parkinson’s disease.

name possible side effects this tumour could have on a patient

The surface of Earth has been changing since Earth formed. Scientists are able to study the changes in the position of Earth's continents using fossils as evidence. The figure shows the Gondwana continents as they are positioned today. The locations of various types of fossil organisms are…

Cell Tissue Organ Organ System Organism

Mention in detail oestrogen level on cardiovascular disease.

Unlock 80+Pro benefits, including unlimited PDF editing and all AI features. Upgrade now 3. Which of the following statements is true regarding osmosis? a) It requires energy to occur b) Solvent moves from a lower solute concentration to a higher solute concentration c) It is not influenced by…

Which of the following is a consequence of coral reef damage? increased biodiversity in the ecosystem loss of habitat for numerous marine species decreased food sources for humans cleaner and healthier oceans

A student builds a model to show how pollutants move through an ecosystem. In plastic tub, the student places a layer of small marbles, covers it with a thick cloth, and then adds a layer of sand. The student then sprinkles red powdered paint on top of the soil. When the student sprays water…

1. Six recessive eye colour mutant lines in Drosophila were crossed in all combinations to conduct a complementation analysis. Using the table below, determine how many eye colour genes are mutated in the six lines, and identify which lines share the same mutated gene (3 marks) Mutant…

Select the correct answer. How will adding NaCl affect the freezing point of a solution? A. The freezing point will remain the same. B. The freezing point will increase. C. The freezing point will decrease. D. The solution will not freeze.

MULTIPLE-CHOICE QUESTION Which KINGDOM are you part of? Animalia Fungi Plantae Rewatch Subrht (a) Montilie $ 6 P $

MULTIPLE-CHOICE QUESTION Which KINGDOM are you part of? $ \square $ Animalia Fungi Plantae Rewatch Subrat

MULTIPLE-CHOICE QUESTION What do EUKARYOTES have? \[ \mathrm{EU}=\mathrm{DO} \] a Nucleus a Cell Wall Rewatch Submit

MULTIPLE-CHOICE QUESTION Fungus cell walls are made of... Cellulose Chitin Rewatch Submit

MULTIPLE-CHOICE QUESTION All PROTISTS have a NUCLEUS. True False Rewatch Submit

MULTIPLE-CHOICE QUESTION What KINGDOM do we call the 'JUNK DRAWER'? Protista Archaea Fungi Rewatch Submit

MULTIPLE-CHOICE QUESTION What organisms have NUCLEUS and a CELL WALL made of CELLULOSE? Fungi Plants Animals Rewatch Submit

MULTIPLE-CHOICE QUESTION What are the 2 PROKARYOTES? Fungi and Protista Animals and Plants Archaea and Bacteria Rewatch Submit

MULTIPLE-CHOICE QUESTION What is TRUE about PROKARYOTES? They have NO NUCLEUS They have a NUCLEUS They are MULTICELLULAR Rewatch Submit

What are the phylum, disease and vector /intermediate host of these species. Trichomona vaginalis Enterobius Vermicolora Schistosoma mansoni Plasmodium falciparum

Differance between double and vingle circulatory system

State two differences in the production of genetically modified bacteria compared to the production of transgenic animals. (2 marks)

Explain why the part of the retina in region Y is very sensitive to dim light.

8 - State two reasons why transgenic animals are produced. (2 marks)

State two differences in the production of genetically modified bacteria compared to the production of transgenic animals. (2 marks)

Describe how bacteria can be modified to produce a human protein. (5 marks) - i need 5 points

Which part of the retina does point X represent? (1 mark) Give a reason for your answer. (1 mark) Explain why the part of the retina in region Y is very sensitive to dim light. (2 marks)

Analyse the data to describe the effect of repeated touching on the time taken for the gill to be exposed again.

With reference to the structures of dopamine and L-dopa, give reasons why the drug L-dopa is effective in the treatment of Parkinson’s disease.

name possible side effects this tumour could have on a patient

Mention in detail oestrogen level on cardiovascular disease.

1. Six recessive eye colour mutant lines in Drosophila were crossed in all combinations to conduct a complementation analysis. Using the table below, determine how many eye colour genes are mutated in the six lines, and identify which lines share the same mutated gene (3 marks) Mutant…

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